Papers - TAJIMA Takuya
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Remnant-Preserved Single-Bundle Anterior Cruciate Ligament Augmentation in Multi-ligamentous Knee Reconstruction. Reviewed
Tajima T*, Yamaguchi N, Morita Y, Yokoe T, Nagasawa M, Ota T, Kawagoe S, Nakamura Y, Chosa E.
Journal of Knee Surgery 2022.6
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Prospective Comparisons of Femoral Tunnel Enlargement With 3 Different Postoperative Immobilization Periods After Double-Bundle Anterior Cruciate Ligament Reconstruction With Hamstring Grafts. Reviewed
Tajima T, Chosa E, Kawahara K, Yamaguchi N.
Arthroscopy 864 - 870 2014.12
Language：English Publishing type：Research paper (scientific journal)
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Arthroscopic anatomical double-bundle anterior cruciate ligament reconstruction for Asian patient using a bone-patellar tendon-bone and gracilis tendon composite autograft: a technical note Invited Reviewed
Takuya Tajima,Etsuo Chosa,Keitarou Yamamoto,Nami Yamaguchi
Sports Medicine, Arthroscopy,Rehabilitation, Therapy &Technology 4 ( 9 ) 2012.3
Language：English Publishing type：Research paper (scientific journal)
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Spectator medicine at an international mega sports event: Rugby World Cup 2019 in Japan Reviewed
Tajima T., Takazawa Y., Yamada M., Moriya T., Sato H., Higashihara J., Toyama Y., Chosa E., Nakamura A., Kono I.
Environmental Health and Preventive Medicine 25 ( 1 ) 72 2020.12
Language：English Publishing type：Research paper (scientific journal) Publisher：Environmental Health and Preventive Medicine
© 2020, The Author(s). Background: The Rugby World Cup (RWC) is one of the biggest international mega sports events in the world. This study was conducted to identify and evaluate the volume, nature, and severity of spectator medical care in the stadiums of 12 venues across Japan during RWC 2019. Method: This was a retrospective review of medical records from spectator medical rooms of 45 official matches of RWC 2019 between September 20 and November 2, 2019. All patients in the stadium who visited the spectator medical room and were transferred to a hospital were included. The wet bulb globe temperature (WBGT) value at the kick-off time of each match, the number of visits to the spectator medical room, and the number of transfers to a hospital were reviewed and analyzed. The patient presentation rate (PPR) was calculated per 10,000 attendees. Severity categories were defined as mild or severe. Mild cases were considered non-life threatening requiring minimal medical intervention, and severe cases required transport to a hospital. Result: The total number of visits to the spectator medical room was 449 with a PPR of 2.63. Most cases (91.5%) were mild in severity. The PPR was significantly higher for the matches held with a WBGT over 25 °C than for the matches under 21 °C (PPR 4.27 vs 2.04, p = 0.04). Thirty-eight cases were transferred to a hospital by ambulance; the PPR was 0.22. The most common reasons for transfer to the hospital were heat illness and fracture/dislocation, at a rate of 15.8% each. The incidence rate of cardiopulmonary arrest per 10,000 attendees was 0.0059 during RWC 2019. Conclusion: Preparation and provision of appropriate medical service for spectators is a key factor for mass-gathering events. During RWC 2019, the majority (91.5%) of patients who sought medical attention did so for minor complaints, which were easily assessed and managed. On the other hand, a higher WBGT situation contributes significantly to an increased PPR (< 21 versus > 25, 2.04 versus 4.27, p = 0.04). Careful medical preparation, management, and development of public education programs for higher WBGT situations will be required in the future for similar international mega sports events.
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Clinical and Radiographic Outcomes of Double-Bundle Anterior Cruciate Ligament Reconstruction for Asian Patients with Bone-Patellar Tendon-Bone and Gracilis Tendon Grafts: A Matched-Control Comparison. Reviewed
Tajima T, Yamaguchi N, Morita Y, Nagasawa M, Ota T, Nakamura Y, Yokoe T, Chosa E
The journal of knee surgery 2020.5
Language：English Publishing type：Research paper (scientific journal)
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Remnant-preserving, selective single-bundle augmentation of the anterior cruciate ligament using a bone–patellar tendon–bone autograft: Reviewed
Takuya Tajima , Etsuo Chosa, Nami Yamaguchi, Noboru Taniguchi, Yasuyuki Ishida
The Knee 32 554 - 558 2016.6
Language：English Publishing type：Research paper (scientific journal)
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Comprehensive safety management and assessment at rugby football competitions Reviewed
Tajima T, Chosa E, Kawahara K, Nakamura Y, Yoshikawa D, Yamaguchi N, Kashiwagi T
International Journal of Sports Medicine 35 ( 12 ) 1012 - 1016 2014.11
Language：English Publishing type：Research paper (scientific journal)
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Hemoglobin stimulates the expression of matrix metalloprotenases, MMP-2 and MMP-9 by synovial cells: a possible cause of joint damage after intra-articular hemorrhage. Reviewed
Takuya Tajima, Etsuo Yoshida, Atsushi Yamashita, Sayuri Ohmura, Yasushi Tomitaka, Masahiko Sugiki, Yujiro Asada, Masugi Maruyama
Journal of Orthopaedic Research 23 891 - 898 2005.4
Language：English Publishing type：Research paper (scientific journal)
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Head Injury Assessment in the Elite Level Rugby Union in Japan: Review of 3 Seasons. Reviewed
Tajima T*, Ota O, Nagayama M, Takahashi M, Yamada M, Ishiyama N, Yoshida I, Takemura M, Hara K, Akama T, Mitsumori N, Higashihara J, Toyama Y, Furuya M, Chosa E, Nakamura A.
International Journal of Sports Medicine 2022.6
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
DOI： 10.1055/a-1810-6509.
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Tajima T., Yamaguchi N., Nagasawa M., Morita Y., Nakamura Y., Chosa E.
BMC Musculoskeletal Disorders 20 ( 1 ) 274 2019.6
Language：English Publishing type：Research paper (scientific journal) Publisher：BMC Musculoskeletal Disorders
© 2019 The Author(s). Background: Bone tunnel enlargement following primary anterior cruciate ligament (ACL) reconstruction with soft tissue graft might be a severe disadvantage for revision surgery. The postoperative rehabilitation protocol including the non-weight-bearing periods were different depending on the surgeon or institute. To determine the relationship between femoral bone tunnel enlargement and the postoperative non-weight-bearing period after double-bundle ACL reconstruction with hamstring grafts. Methods: Forty-two patients who underwent primary double-bundle ACL reconstruction with hamstring grafts were divided into two postoperative non-weight-bearing protocol groups: 1-week non-weight-bearing postoperatively (group A, n = 19); and 2-week non-weight-bearing (group B, n = 18). Five cases were excluded due to additional knee injury, pregnancy, and lost to follow-up. Bone tunnel enlargement was evaluated by computed digital radiographs (anteroposterior (A-P) and lateral views) taken on the first postoperative day and at 12 months. Each tunnel diameter was shown as a percentage to the maximum joint width of the proximal tibia in the A-P view, or a percentage of the maximum diameter of the patella in the lateral view. To determine the incidence of tunnel enlargement, percentage diameter changes of more than 10% were defined as an enlarged tunnel. The magnitude of tunnel enlargement and the standard clinical evaluation were also evaluated. Results: There were no significant differences between groups in the incidences of anteromedial and posterolateral bone tunnel enlargement, both in the A-P and lateral views (2 × 2 Chi-squared test). The magnitude of femoral posterolateral bone tunnel enlargement was significantly greater in group A in the A-P view (p = 0.01) and lateral view (p = 0.03) (Mann Whitney U-test). Twelve months after surgery, the Lysholm score and Tegner activity level scale were not significantly different between the groups. Conclusions: This prospective, clinical and radiographical study showed that early weight-bearing protocol after double-bundle ACL reconstruction with hamstring grafts might have the potential risk of significant postoperative femoral bone tunnel enlargement of the posterolateral bundle. There was no significant difference in clinical outcomes by postoperative non-weight-bearing period. To reduce and prevent the femoral bone tunnel enlargement, the comprehensive management could be considered and required to establish the suitable early stage rehabilitation protocol after surgery. Trial registration: Trial registration number; UMIN000036212. Scientific title: Prospective comparisons of femoral tunnel enlargement with two different postoperative non weight bearing periods after double-bundle anterior cruciate ligament reconstruction with hamstring grafts. Registered date: 15 Mar 2019 (retrospectively registered).
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Hemoglobin stimulates the expression of ADAMTS-5 and ADAMTS-9 by synovial cells; a possible cause of articular cartilage damage after intra-articular hemorrhage Invited Reviewed
Tajima T., Sekimoto T., Yamaguchi N., Taniguchi N., Kurogi S., Maruyama M., Chosa E.
BMC Musculoskeletal Disorders 18 ( 1 ) 449 - 457 2017.11
Language：English Publishing type：Research paper (scientific journal)
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Effect of genu recurvatum on the anterior cruciate ligament-deficient knee during gait Reviewed
Katsuhiro Kawahara,Tomohisa Sekimoto,Shinji Watanabe,Keitaro Yamamoto,Takuya Tajima,Nami Yamaguchi, Etsuo Chosa
Knee Surgery, Sports Traumatology, Arthroscopy 20 ( 8 ) 1479 - 1487 2012.8
Language：English Publishing type：Research paper (scientific journal)
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Anterior cruciate ligament reconstruction in a patient with Athetoid cerebral palsy Reviewed
Takuya Tajima, Etsuo Chosa, Keitarou Yamamoto, Nami Yamaguchi, Shinji Watanabe
Sports Medicine, Arthroscopy,Rehabilitation, Therapy &Technology 36 ( 4 ) 2012.4
Language：English Publishing type：Research paper (scientific journal)
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Yokoe T, Tajima T, Yamaguchi N, Nagasawa M, Ota T, Morita Y, Chosa E
BMJ open 11 ( 1 ) e042188 2021.1
Language：English Publishing type：Research paper (scientific journal) Publisher：BMJ Open
Objectives Medical examinations for adult elite athletes are performed all over the world, however, no studies in the relevant English literature have reported on orthopaedic medical examinations for young amateur athletes. The purpose of this study was to report the results of orthopaedic medical examinations of the spine and lower extremities in young amateur athletes. Methods This repeated cross-sectional study from 2014 to 2018 included a total of 323 young amateur athletes (age, 12-18 years) who were active in one of the following four sports: boxing, canoeing, weightlifting and track and field. The orthopaedic medical examination consisted of six assessments (physical examinations, the generalised joint laxity, muscle and joint tightness, static alignment and muscle volume of the lower extremities and the medial longitudinal arch of the foot). Questions regarding pain in the spine and lower extremities were also performed. Results Among 323 young amateur athletes, 17 (5.3%) had received orthopaedic treatment at the time of the medical examination, with spondylolysis being the most common cause (29.4%, 5/17). Among 306 young athletes who had not received orthopaedic treatment, 61 (19.9%) had at least one positive finding in physical examinations or had pain in the spine or lower extremities. Anterior drawer test of the ankle and Kemp test for the spine accounted for 34% and 28% of positive findings, respectively. Low back pain and knee pain accounted for 58% and 16% of pain, respectively. Conclusions The present study showed that approximately one-fifth of young amateur athletes who had not received orthopaedic treatment had pain in the spine and lower extremities and positive findings in physical examinations that may require orthopaedic treatments. In addition to the early detection of injuries, orthopaedic medical examinations for young amateur athletes provide an opportunity to educate such athletes.
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Comparison of symptomatic spondylolysis in young soccer and baseball players Reviewed
Yokoe T., Tajima T., Sugimura H., Kubo S., Nozaki S., Yamaguchi N., Morita Y., Chosa E.
Journal of Orthopaedic Surgery and Research 15 ( 1 ) 378 2020.9
Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Orthopaedic Surgery and Research
© 2020 The Author(s). Background: Spondylolysis is the main cause of low back pain (LBP) in young athletes. There are few studies analyzing the difference of spondylolysis among young athletes with different sports activities. The purpose of this study was to compare the clinical factors and distribution of the lesions of spondylolysis on magnetic resonance imaging (MRI) scans in young soccer and baseball players with symptomatic spondylolysis. Methods: The medical records of 267 young athletes aged 7 to 18 years old who underwent MRI to evaluate the cause of LBP between 2017 and 2020 were retrospectively reviewed to identify patients with spondylolysis. Of the young athletes with symptomatic spondylolysis, clinical factors and MRI findings in soccer and baseball players were retrospectively evaluated. The clinical factors were age, sex, interval from onset of LBP to MRI, and side of the dominant leg in the sports field. MRI findings included number, lumbar level, and side of the lesions. Results: A total of 33 soccer players (mean age, 15.4 ± 1.4 years) and 49 baseball players (mean age, 15.4 ± 1.6 years) with symptomatic spondylolysis were enrolled. All patients were male. No significant differences were noted in age and the interval from onset of LBP to MRI between the groups. Soccer players had greater numbers of multiple (p < 0.001) and bilateral (p < 0.001) lesions than baseball players. The dominant side of the hand for pitching or batting was correlated with the contralateral-side lesions in baseball players (p = 0.001). Conclusions: The distribution of the lesions of spondylolysis differed in young soccer and baseball players. Pitching or batting with the dominant-side hand would be associated with contralateral-side lesions in baseball players. Sports-specific movements and the side of the dominant leg should be considered when treating young athletes with symptomatic spondylolysis.
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ラグビー選手における頚椎退行変性の予防-頚部体幹コアトレーニング導入の効果- Reviewed
田島卓也、帖佐悦男、河原勝博、山口奈美、中村嘉宏
日本整形外科スポーツ医学会雑誌 34 ( 1 ) 80 - 84 2014.4
Language：Japanese Publishing type：Research paper (scientific journal)
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Yamaguchi Y., Lee D., Nagai T., Funamoto T., Tajima T., Chosa E.
Journal of Medical Internet Research 22 ( 8 ) e18684 2020.8
Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Medical Internet Research
© 2020 Journal of Medical Internet Research. All rights reserved. Background: Most people currently use the internet to obtain information about many subjects, including health information. Thus, medical associations need to provide accurate medical information websites. Although medical associations have their own patient education pages, it is not clear if these websites actually show up in search results. Objective: The aim of this study was to evaluate how well medical associations function as online information providers by searching for information about musculoskeletal-related pain online and determining the ranking of the websites of medical associations. Methods: We conducted a Google search for frequently searched keywords. Keywords were extracted using Google Ads Keyword Planner associated with "pain" relevant to the musculoskeletal system from June 2016 to December 2019. The top 20 search queries were extracted and searched using the Google search engine in Japan and the United States. Results: The number of suggested queries for "pain" provided by Google Ads Keyword Planner was 930 in the United States and 2400 in Japan. Among the top 20 musculoskeletal-related pain queries chosen, the probability that the medical associations' websites would appear in the top 10 results was 30% in the United States and 45% in Japan. In five queries each, the associations' websites did not appear among the top 100 results. No significant difference was found in the rank of the associations' website search results (P=.28). Conclusions: To provide accurate medical information to patients, it is essential to undertake effective measures for search engine optimization. For orthopedic associations, it is necessary that their websites should appear among the top search results.
DOI： 10.2196/18684
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Yokoe T, Tajima T, Yamaguchi N, Morita Y, Chosa E
The journal of knee surgery 34 ( 11 ) 1237 - 1242 2020.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Knee Surgery
Atopic dermatitis (AD), sometimes referred to as eczema, is a common skin disease, and skin barrier dysfunction and immunological disorders are well recognized. However, surgical wound complications after orthopaedic surgery in patients with AD have not been described. This study aimed to report four patients with AD who developed foreign body reactions to FiberWire sutures with or without surgical wound infection (SSI) after knee cruciate ligament reconstruction (CLR). The mean age was 19.8 (range, 16-25) years, and patients 1 and 3 underwent reconstructions of the posterior and anterior cruciate ligament, respectively. At a mean of 7.5 (range, 4-10) weeks postoperatively, discharge from the surgical wound at the tibial side of the fixed graft was identified. All patients were treated with continuous saline lavage and antibiotics; however, their wounds did not heal. Second-look arthroscopy and hardware removal were performed at a mean 12.2 (range, 9-15) months postoperatively. Proliferated granulation tissue surrounding the FiberWire was identified. Intraoperative wound cultures were negative in three of the four patients. Histological examination of the tissues adjacent to the FiberWire revealed a foreign body reaction. All wounds healed immediately after the second surgery. In addition to SSI, foreign body reactions are more likely to occur in patients with AD than in those without AD. Preoperative management of AD by dermatologists and consideration of appropriate suture materials are mandatory to reduce surgical wound complications after knee CLR in patients with AD.
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Elective one-stage all four-ligament reconstruction after open knee dislocation: A case report Reviewed
Yokoe T., Tajima T., Yamaguchi N., Chosa E.
Journal of Orthopaedic Science 27 ( 3 ) 743 - 749 2019.9
Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Orthopaedic Science
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Copy number loss in the region of the ASPN gene in patients with acetabular Dysplasia Reviewed
Sekimoto T., Ishii M., Emi M., Kurogi S., Funamoto T., Yonezawa Y., Tajima T., Sakamoto T., Hamada H., Chosa E.
Bone and Joint Research 6 ( 7 ) 439 - 445 2017.7
Language：English Publishing type：Research paper (scientific journal) Publisher：Bone and Joint Research
© 2017 Cao et al. Objectives: We have previously investigated an association between the genome copy number variation (CNV) and acetabular dysplasia (AD). Hip osteoarthritis is associated with a genetic polymorphism in the aspartic acid repeat in the N-terminal region of the asporin (ASPN) gene; therefore, the present study aimed to investigate whether the CNV of ASPN is involved in the pathogenesis of AD. Methods: Acetabular coverage of all subjects was evaluated using radiological findings (Sharp angle, centre-edge (CE) angle, acetabular roof obliquity (ARO) angle, and minimum joint space width). Genomic DNA was extracted from peripheral blood leukocytes. Agilent's regiontargeted high-density oligonucleotide tiling microarray was used to analyse 64 female AD patients and 32 female control subjects. All statistical analyses were performed using EZR software (Fisher's exact probability test, Pearson's correlation test, and Student's t-test). Results: CNV analysis of the ASPN gene revealed a copy number loss in significantly more AD patients (9/64) than control subjects (0/32; p = 0.0212). This loss occurred within a 60 kb region on 9q22.31, which harbours the gene for ASPN. The mean radiological parameters of these AD patients were significantly worse than those of the other subjects (Sharp angle, p = 0.0056; CE angle, p = 0.0076; ARO angle, p = 0.0065), and all nine patients required operative therapy such as total hip arthroplasty or pelvic osteotomy. Moreover, six of these nine patients had a history of operative or conservative therapy for developmental dysplasia of the hip. Conclusions: Copy number loss within the region harbouring the ASPN gene on 9q22.31 is associated with severe AD. A copy number loss in the ASPN gene region may play a role in the aetiology of severe AD.
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Screening for musculoskeletal problems in Japanese schoolchildren: a cross-sectional study nested in a cohort（共著） Reviewed
N.Yamaguchi，E.Chosa，K.Yamamoto，K.Kawahara，H.Hamada，N.Taniguchi，T.Tajima，T.Funamoto，S.Kurogi，T.Ota，S.Nakamura
Public Health 139 189 - 197 2016.8
Language：English Publishing type：Research paper (scientific journal)
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ラグビー競技会における医療体制向上と重傷事故発生予防を目的とした安全度評価法の活用 Reviewed
田島卓也、帖佐悦男、山本惠太郎、中村嘉宏、山口奈美、柏木輝行
日本整形外科スポーツ医学会雑誌 32 ( 2 ) 35 - 40 2012.4
Language：Japanese Publishing type：Research paper (scientific journal)
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膝前十字靭帯再再建術症例の検討 Reviewed
田島卓也、山本惠太郎、石田康行、山口奈美、崎浜智美、帖佐悦男
JOSKAS雑誌 36 ( 4 ) 258 - 263 2011.4
Language：Japanese Publishing type：Research paper (scientific journal)
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九州地方にて開催されたラグビー競技会に対する安全度評価 Reviewed
田島卓也、帖佐悦男、山本惠太郎、河原勝博、中村嘉宏、吉川大輔、吉川教恵、柏木輝行、東原潤一郎
日本臨床スポーツ医学会雑誌 16 ( 3 ) 402- - 407 2008.4
Language：Japanese Publishing type：Research paper (scientific journal)
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ラグビー競技会に対する安全度評価について Reviewed
田島卓也
日本臨床スポーツ医学会雑誌 12 ( 3 ) 478 - 482 2004.4
Language：Japanese Publishing type：Research paper (scientific journal)
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医学部ラグビー部員の頚部周囲筋力 Reviewed
田島卓也、田島直也、帖佐悦男、園田典生、山本惠太郎
日本臨床スポーツ医学会雑誌 490 - 494 2002.4
Language：Japanese Publishing type：Research paper (scientific journal)
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医学部ラグビー部員の頚椎変化：初心者における2年間での変化 Reviewed
田島卓也、田島直也、帖佐悦男、園田典生、樋口潤一
九州・山口スポーツ医科学研究会誌 12 86 - 91 2000.4
Language：Japanese Publishing type：Research paper (scientific journal)
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医学部ラグビー部員の頚椎変化(第一報）；初心者における1年間での変化 Reviewed
田島卓也、田島直也、帖佐悦男、園田典生、樋口潤一
日本整形外科スポーツ医学会雑誌 20 ( 1 ) 92 - 97 2000.4
Language：Japanese Publishing type：Research paper (scientific journal)
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医学部ラグビー部員の頚椎変化 Reviewed
田島卓也、田島直也、帖佐悦男、園田典生、樋口潤一
日本整形外科スポーツ医学会雑誌 19 ( 1 ) 63 - 68 1999.4
Language：Japanese Publishing type：Research paper (scientific journal)
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Yang F., Yokoe T., Ouchi K., Tajima T., Kamei N., Chosa E.
Scientific Reports 15 ( 1 ) 10008 2025.12
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Scientific Reports
Whether isolated high tibial osteotomy (HTO) or HTO combined with medial meniscus posterior root (MMPR) repair is the optimal surgical treatment of MMPR tears remains controversial. This study compared the biomechanical effects of isolated HTO versus MMPR repair combined with medial open wedge HTO (MOWHTO) or lateral closed wedge HTO (LCWHTO) using finite element analysis (FEA). In this study, the MRI and CT data of the knee joint were used to create an FEA model. MOWHTO and LCWHTO simulations adjusted the mechanical axis to the Fujisawa point, with MMPR conditions simulated as intact, tear, or repaired. The ankle center was fixed and a 1000 N force was applied to the knee. In the LCWHTO models, the posterior tibial slope (PTS) decreased, whereas it increased in the MOWHTO models. Changes in the PTS following HTO influenced the stress distribution in the MMPR. HTO combined with MMPR repair showed a reduction in the maximum contact stress by 5.4–11.4% and increased contact area by 29.5–41.0% in the medial knee compartment relative to isolated HTO. This study demonstrated that MMPR repair combined with LCWHTO would be more protective against stress loading in the MMPR than MMPR repair combined with MOWHTO or isolated HTO.
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Yokoe T., Yang F., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Foot and Ankle Surgery 31 ( 1 ) 20 - 24 2025.1
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Foot and Ankle Surgery
Background: This study aimed to investigate ankle syndesmosis in healthy subjects under non-weight bearing (NWB) and weight bearing (WB) conditions using two US methods. Methods: The anterior tibiofibular clear space (ATFCS) was measured in healthy subjects in NWB and WB conditions using two US procedures. Method 1 measured 10 mm above the ankle joint and Method 2 measured 30° from the line of 10 mm above the ankle joint. Results: A total of 60 ankles from 30 subjects (male/female, 15/15) were included. There was a significant difference in the ATFCS between the two US methods (p < 0.001), and Method 2 was better at detecting the change in diastasis from NWB to WB conditions. The ATFCS was significantly greater on WB than on NWB, irrespective of the US method. Conclusions: Method 2 was better at detecting diastasis of the syndesmosis from NWB to WB conditions. The influence of WB needs to be considered when evaluating syndesmosis using US. Level of evidence: Cross-sectional cohort study; Level of evidence, Ⅳ
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Yang F., Yokoe T., Ouchi K., Tajima T., Chosa E.
Lecture Notes in Electrical Engineering 1322 LNEE 3 - 12 2025
Authorship：Lead author, Last author, Corresponding author Publishing type：Research paper (scientific journal) Publisher：Lecture Notes in Electrical Engineering
This research explored how different tibial slope (TS) and tibial tunnel angle (TTA) settings impact the tibial tunnel phenomenon in posterior cruciate ligament (PCL) reconstruction using 3D finite element analysis (FEA). Models derived from CT scans of a healthy male recruiter were utilized. Tibial bone tunnels and PCL grafts were designed using SolidWorks with various tunnel angles (60°, 45°, 30°). Anterior wedge high tibial osteotomy (AW-HTO) was conducted to assess the effects of different TS angles (−4°, −8°, native, +8°, +4°). Finite element analysis (FEA) was conducted using specialized software. In each TS model, the maximum equivalent Von Mises stress (VMS) in PCL grafts diminished with an increase in TTA. Similarly, in each TTA model, the maximum VMS in PCL grafts reduced as the TS angle increased. Increasing both TTA and TS decreased the area of “high-contact stress” at the tibial tunnel (stress exceeding 10 MPa), potentially reducing stress at the “killer turn” during PCL reconstruction.
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Morita Y., Tajima T., Yamaguchi N., Yokoe T., Nagasawa M., Ota T., Ouchi K., Chosa E.
Scientific Reports 14 ( 1 ) 6192 2024.12
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Scientific Reports
Posterior tibial translation (PTT) after double-bundle posterior cruciate ligament (PCL) reconstruction has sometimes occurred. Purpose of this study is to identify the risk factors for postoperative PTT after double-bundle PCL reconstruction with a hamstring autograft. Comparing the results of bilateral gravity sag view (GSV) at 12 months after surgery, over 5-mm PTT was defined as ‘failure’ in this study. Of 26 isolated PCL reconstruction cases, over 5-mm PTT was seen in 7 cases (group F: 9.57 ± 1.28 mm), and 19 cases had less than 5 mm (group G: 2.84 ± 1.29 mm). Age, sex, body mass index (BMI), preoperative GSV, posterior slope angle of the tibia, anterolateral bundle (ALB) and posteromedial bundle (PMB) graft diameters, and tibial tunnel diameter were evaluated. The two groups were compared with the 2 × 2 chi-squared test, the Mann Whitney U-test, and Spearman’s rank correlation coefficient. Multivariate logistic regression analysis was also performed to determine the risk factor. Statistical significance was indicated as p < 0.01 for correlation with postoperative PTT, and as p < 0.05 for all other comparisons. Mean age (group G 31.8 ± 12.5 vs group F 34.9 ± 15.9 years), sex (male/female: 15/4 vs 3/4), BMI (25.6 ± 4.6 vs 24.9 ± 3.9 kg/m2), preoperative GSV (11.3 ± 2.2 vs 11.6 ± 2.9 mm), PMB diameter (5.37 ± 0.33 vs 5.36 ± 0.48 mm), and tibial tunnel diameter (9.32 ± 0.58 vs 9.29 ± 0.49 mm) showed no significant differences. ALB diameter was significantly greater in group G (7.0 ± 0.5 mm) than in group F (6.5 ± 0.29 mm; p = 0.022). There was also a significant difference in posterior tibial slope angle (group G 9.19 ± 1.94 vs group F 6.54 ± 1.45, p = 0.004). On Spearman rank correlation coefficient analysis, ALB diameter GSV (correlation coefficient: − 0.561, p = 0.003) and posterior tibial slope angle (correlation coefficient: − 0.533, p = 0.005) showed a significant correlation with postoperative PTT. Multivariate logistic regression analysis showed that ALB diameter (OR 19.028; 95% CI 1.082–334.6; p = 0.044) and posterior slope angle of tibia (OR 3.081; 95% CI 1.109–8.556; p = 0.031) were independently associated with postoperative PTT, respectively. In double-bundle PCL reconstruction with hamstring, smaller ALB graft diameter and lower (flatted) tibial slope angle were considered risk factors for postoperative PTT.
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Direct repair of the chronic ochronotic Achilles tendon rupture: a case report Reviewed
Yokoe T., Nagasawa M., Tajima T., Yamaguchi N., Ota T., Morita Y., Chosa E.
BMC Musculoskeletal Disorders 25 ( 1 ) 843 2024.12
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：BMC Musculoskeletal Disorders
Background: Alkaptonuria (AKU) is a rare hereditary disease. Ochronotic arthropathy, tendinopathy, and osteopenia/osteoporosis are generally musculoskeletal manifestations in patients with AKU. Because of the ochronotic tendinopathy and osteopenia, the surgical strategy for chronic ochronotic Achilles tendon rupture may be challenging. No studies have reported the surgical treatment of chronic Achilles tendon rupture in patients with AKU. Case presentation: We report a case of AKU that required surgical treatment for chronic Achilles tendon rupture. A 60-year-old woman was referred to our department for the assessment of left hindfoot pain that persisted for more than nine months after an ankle sprain. Three years prior to the first presentation to our hospital, she was diagnosed with AKU due to pigmented hip cartilage at the time of total hip arthroplasty. The patient was diagnosed as chronic Achilles tendon rupture based on the results of physical examination and magnetic resonance imaging (MRI). The MRI showed enlarged scar tissue of the Achilles tendon with an intrasubstance high signal intensity. We performed resection of the central part of the scar tissue (total length, 24 mm) followed by direct repair using the proximal and distal stumps of the scar tissue. The MRI at 12months after surgery showed continuity of the repaired Achilles tendon. At 18 months after surgery, the Achilles Tendon Total Rupture Score improved from 22 points preoperatively to 84 points postoperatively. The foot and ankle outcome score also improved. Conclusions: We reported a case of AKU with chronic Achilles tendon rupture in which direct repair using scar tissue between the tendon stumps was effective. Careful selection of the surgical procedure for the treatment of chronic ochronotic Achilles tendon rupture is recommended because of concomitant ochronotic tendinopathy and osteopenia/osteoporosis.
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Yokoe T., Yang F., Tajima T., Chosa E.
BMC Musculoskeletal Disorders 25 ( 1 ) 764 2024.12
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：BMC Musculoskeletal Disorders
Background: The evaluation of lateral ankle laxity remains challenging when diagnosing chronic lateral ankle instability (CLAI). Several studies have reported that internal rotation of the talus as an indicator of rotational lateral ankle laxity (RLAL) increases in patients with CLAI. However, there is no established method for detecting and evaluating the RLAL. This study aimed to report a novel method for evaluating the RLAL in the gravity stress position by measuring the talofibular distance (TFD) using ultrasonography (US) and show the normative value of the TFD. Methods: The TFDs in the subjects with healthy ankles were prospectively measured 10 mm distal to the ankle joint in the neutral ankle position and gravity stress position using US. The differences in the TFD between the two ankle positions were evaluated. The differences in the TFD by gender and ankle laterality were also evaluated. Results: A total of 52 healthy ankles of 28 subjects (mean age, 24.0 ± 1.6; male/female, 12/16) were finally included. There was a significant difference in the TFD between the neutral ankle position (6.9 ± 0.9 mm) and gravity stress position (9.0 ± 0.9 mm) (p < 0.001). The mean difference in the TFD between the two ankle positions was 2.1 ± 0.6 mm. There were no significant differences in the TFD by gender and ankle laterality. Conclusions: The present study reported a novel US method for evaluating RLAL by applying gravity stress and the normative value of the TFD.
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特集 外来でできる運動器疾患に対する最先端保存療法 神経筋電気刺激療法(NMES)の筋萎縮予防･筋力増強効果 Reviewed
田島 卓也, 帖佐 悦男
関節外科 基礎と臨床 43 ( 14 ) 116 - 123 2024.10
Authorship：Lead author, Corresponding author Publishing type：Research paper (scientific journal) Publisher：メジカルビュー社
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Yokoe T., Yang F., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Foot and Ankle Surgery 30 ( 7 ) 608 - 611 2024.10
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Foot and Ankle Surgery
Background: This study aimed to evaluate the shape of the retromalleolar groove of the tibialis posterior tendon (TPT) using computed tomography (CT). Methods: CT images of patients with foot or ankle pathologies were retrospectively reviewed. The morphology of the retromalleolar groove of the TPT was assessed at two different levels: the ankle joint and 10 mm above the ankle joint. The groove shape was classified into three types; concave, flat, or irregular. In cases with concave grooves, the width and depth of the grooves were measured. Results: Of the 116 ankles from 116 subjects included in this study, 80.2 % showed a shallow concave shape (mean depth, 1.6 mm) at the two scan levels. The shape and width of the groove differed significantly by gender, although there was no significant difference in the groove depth. Conclusion: Approximately 80% showed a shallow concave groove of the TPT. The groove characteristics differed by gender, although there was no significant difference in the groove depth. Level of evidence: Cross-sectional cohort study; Level of evidence, Ⅳ
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リファンピシン使用によりステロイド作用が減弱し治療に難渋した手関節非結核性抗酸菌症の1例
松永 美穂, 大田 智美, 田島 卓也, 山口 奈美, 長澤 誠, 森田 雄大, 横江 琢示, 帖佐 悦男
整形外科と災害外科 73 ( 3 ) 602 - 605 2024.9
Authorship：Lead author, Last author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：西日本整形・災害外科学会
【はじめに】ステロイド薬は他薬との薬物相互作用が比較的少なく汎用されるが，抗結核薬のリファンピシン（以下RFP）との相互作用はあまり知られていない．ネフローゼ症候群加療中に非結核性抗酸菌症（以下NTM）を合併し，ステロイドとRFPの併用で原疾患およびNTMの治療に難渋した1例を経験した．【症例】41歳男性，21歳時にネフローゼ症候群と診断され，ステロイドを内服中に手関節掌背側の腫脹を認め，滑膜切除術後に非結核性抗酸菌性滑膜炎の診断となった．RFPを含む抗結核薬3剤を開始したところ，ネフローゼ症候群が悪化しステロイドを増量，尿蛋白は改善するも手関節腫脹が再発し，2回目の滑膜切除術施行後，高気圧酸素療法で感染は鎮静化した．【考察】NTMにはRFPが汎用されるが，ステロイドとの相互作用により治療に難渋することがある．薬物の相互作用を十分に熟知し，NTMの治療にあたる必要がある．
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特集 大規模レジストリーによる整形外科リアルワールドエビデンス構築 関節鏡およびスポーツ整形外科関連手術に対するレジストリー-JOSKAS eNOTEからJSOAレジストリーへ Reviewed
田島 卓也, 鈴木 朱美
臨床整形外科 59 ( 7 ) 891 - 895 2024.7
Authorship：Lead author, Corresponding author Publishing type：Research paper (scientific journal) Publisher：株式会社医学書院
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Ureter position and risk of ureteral injury during lateral lumbar interbody fusion Reviewed
Hamanaka H., Tajima T., Kurogi S., Higa K., Nagai T., Kuroki T., Takamori H., Mukai S., Kamoto T., Chosa E.
Journal of Orthopaedic Science 2024.5
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Differences in Retromalleolar Fibular Groove Morphology According to Level of Axial Computed Tomography Scans Reviewed
Takuji Yokoe, Takuya Tajima, Koki Ouchi, Nami Yamaguchi, Yudai Morita, and Etsuo Chosa
The Orthopaedic Journal of Sports Medicine 12 ( 3 ) 2024.3
Language：English Publishing type：Research paper (scientific journal)
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Screening of Undiagnosed Increased Lateral Ankle Laxity Using Stress Ultrasonography Reviewed
Yokoe T., Tajima T., Chosa E., Yamaguchi N., Morita Y.
Orthopaedic Journal of Sports Medicine 12 ( 4 ) 23259671241235162 2024.3
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Orthopaedic Journal of Sports Medicine
Background: Some patients with lateral ankle sprain (LAS) will experience chronic lateral ankle instability (CLAI). However, not all of those with residual increased lateral ankle laxity (ILAL) become symptomatic. There is a lack of evidence regarding the prevalence of undiagnosed ILAL in the general population. Purpose: To evaluate the prevalence of undiagnosed ILAL with the use of stress ultrasonography (US) and to investigate the percentage of ankle sprain copers (ASCs) with ILAL. Study Design: Cross-sectional study; Level of evidence, 3. Methods: The anterior talofibular ligament (ATFL) lengths in college students without diagnosis of CLAI were measured consecutively in stress and nonstress positions. The ATFL ratio was calculated as an indicator of lateral ankle laxity according to a previously reported method. The manual anterior drawer test was also performed. The Cumberland Ankle Instability Tool (CAIT) and Ankle Instability Instrument (AII) were used to assess subjective impairments related to CLAI. The correlation between the ATFL ratio and CAIT score was evaluated. Results: A total of 207 ankles from 106 participants (mean age, 23.9 ± 2.2 years; male/female, 64/42) were included. Overall, 38 participants (35.8%; 50 ankles [24.2%]) were classified as having undiagnosed ILAL. Of the ankles with no history of LAS, 8% showed ILAL. Overall, 53 participants (50%) had a history of LAS and were all classified as ASCs. Of the 82 ankles from these ASCs, 40 (48.8%) were regarded as having undiagnosed ILAL. There was no correlation between the ATFL ratio and CAIT scores (r = -0.09, P =.414). Conclusion: The prevalence of undiagnosed ILAL by stress US screening was approximately one-third in young adults. In this study, 48.8% of the ankles from ASCs showed ILAL.
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Risk of Skull Perforation with Halo Vest Skull Pins Reviewed
Hamanaka Hideaki, Tajima Takuya, Kurogi Syuji, Higa Kiyoshi, Nagai Takuya, Takahashi Takumi, Matsumoto Takayuki, Chosa Etsuo
Spine Surgery and Related Research 8 ( 5 ) 480 - 484 2024
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：The Japanese Society for Spine Surgery and Related Research
Introduction: A halo vest is an immobilization device widely used to stabilize the cervical spine. Pain and infection at the skull pin insertion site are common complications, but skull perforation is rare, and most published studies are case reports. This study aimed to identify risk factors for skull perforation by comparing patients who did and did not develop perforation.Methods: Overall thickness and the thicknesses of the internal and external laminae of the skull at the skull pin insertion sites were measured on cranial computed tomography scans of 66 patients fitted with a halo vest. The results were compared between patients who did and did not develop perforation.Results: Four patients developed perforations. All patients with perforation were older women, and their external and internal laminae were significantly thinner than those of patients who did not develop perforation.Conclusions: The reported causes of skull pin perforation include infection around the pin, osteoporosis, and an enlarged frontal sinus. However, most patients with perforation in the present study were older women, and the cause was the thinning of the external and external laminae.
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3．ジャパンラグビーリーグワンにおける外傷・障害調査 Reviewed
田島 卓也, 帖佐 悦男, 中村 明彦
日本臨床スポーツ医学会誌 32 ( 3 ) 342 - 344 2024
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：一般社団法人 日本臨床スポーツ医学会
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Miyazaki S., Fujii Y., Tsuruta K., Yoshinaga S., Hombu A., Funamoto T., Sakamoto T., Tajima T., Arakawa H., Kawaguchi T., Nakatake J., Chosa E.
Peerj 12 ( 10 ) e18351 2024
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Peerj
Background. Understanding the gait pattern of patients eligible for total hip arthroplasty (THA) due to hip osteoarthritis (OA) offers valuable information for improving locomotive syndrome (LS). This study aims to measure the gait patterns of THA-eligible patients using an optical motion capture system and to analyze these patterns using principal component analysis (PCA). Additionally, this study examines the relationship between THA-induced gait patterns and LS. Methods. This before-after study included 237 patients who underwent unilateral primary THA due to hip OA. The primary outcome measures were spatiotemporal gait parameters. Secondary outcome measures included three LS risk tests: a stand-up test, a two-step test, a 25-question Geriatric Locomotive Function Scale (GLFS-25), and total clinical decision limits stages. PCA was performed using 16 spatiotemporal gait parameters collected before and three months after THA. Principal components (PC) were selected to achieve a cumulative contribution rate of 90% (0.9) or higher. Each summarized PC was compared using a paired t-test before and three months after THA. Furthermore, multiple regression analysis was conducted to determine how changes in each PC between before and three months after THA related to changes in the four LS evaluation items. Results. PCA identified three principal components (PC1, PC2, PC3) that accounted for a cumulative contribution rate of 0.910 using 16 spatiotemporal gait parameters. When comparing before and three months after THA for all three PCs, significant differences were observed in each PC (p < 0.001), with overall walking ability and stance phase being higher three months after THA than before THA, while the asymmetry of support time was lower three months after THA. The results of multiple regression analysis revealed that PC1, PC2, and PC3 were the most influential factors in total clinical decision limits stage. For each LS risk test, the factors related to the stand-up test were identified as PC1, PC2, and PC3, while the factors related to the two-step test were identified as PC1 and PC2. The factors related to the GLFS-25 were also identified as PC1 and PC2. Conclusions. The most important findings of this study indicate that the three PCs represent over 90% of the 16 spatiotemporal gait parameters, which are associated with total clinical decision limits stage and LS risk tests. The present results suggest that PC1 represents overall walking ability, PC2 represents the stance phase, and PC3 represents asymmetry of support time. Gait pattern characteristics, such as overall walking ability, stance phase, and asymmetry of support time, were clearly defined by these PCs. Regarding the relationship between PC and LS, all three PCs are related to total clinical decision limits stage. In addition, PC1 and PC2 related to all three LS risk tests, and PC3 related only to the stand-up test.
DOI： 10.7717/peerj.18351
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Age- and sex-related differences in upper-body joint and endpoint kinematics during a drinking task in healthy adults. Reviewed
Jun Nakatake, Hideki Arakawa, Takuya Tajima, Shigeaki Miyazaki, Etsuo Chosa
PeerJ 2023.12
Language：English Publishing type：Research paper (scientific journal)
DOI： 10.7717/peerj.16571
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Tmem161a regulates bone formation and bone strength through the P38 MAPK pathway Reviewed
Nagai T., Sekimoto T., Kurogi S., Ohta T., Miyazaki S., Yamaguchi Y., Tajima T., Chosa E., Imasaka M., Yoshinobu K., Araki K., Araki M., Choijookhuu N., Sato K., Hishikawa Y., Funamoto T.
Scientific Reports 13 ( 1 ) 14639 2023.12
Language：English Publishing type：Research paper (scientific journal) Publisher：Scientific Reports
Bone remodeling is an extraordinarily complex process involving a variety of factors, such as genetic, metabolic, and environmental components. Although genetic factors play a particularly important role, many have not been identified. In this study, we investigated the role of transmembrane 161a (Tmem161a) in bone structure and function using wild-type (WT) and Tmem161a-depleted (Tmem161aGT/GT) mice. Mice femurs were examined by histological, morphological, and bone strength analyses. Osteoblast differentiation and mineral deposition were examined in Tmem161a-overexpressed, -knockdown and -knockout MC3T3-e1 cells. In WT mice, Tmem161a was expressed in osteoblasts of femurs; however, it was depleted in Tmem161aGT/GT mice. Cortical bone mineral density, thickness, and bone strength were significantly increased in Tmem161aGT/GT mice femurs. In MC3T3-e1 cells, decreased expression of alkaline phosphatase (ALP) and Osterix were found in Tmem161a overexpression, and these findings were reversed in Tmem161a-knockdown or -knockout cells. Microarray and western blot analyses revealed upregulation of the P38 MAPK pathway in Tmem161a-knockout cells, which referred as stress-activated protein kinases. ALP and flow cytometry analyses revealed that Tmem161a-knockout cells were resistant to oxidative stress. In summary, Tmem161a is an important regulator of P38 MAPK signaling, and depletion of Tmem161a induces thicker and stronger bones in mice.
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Diagnostic utility of anteroposterior measurements of the median nerve on sagittal ultrasonographic images and their correlation with clinical findings in carpal tunnel syndrome. Reviewed
Okura T, Tajima T, Fukuda H, Matsuoka T, Chosa E
Journal of clinical ultrasound : JCU 2023.10
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Remnant-Preserved Single-Bundle Anterior Cruciate Ligament Augmentation in Multi-ligamentous Knee Reconstruction. Reviewed
Tajima T, Yamaguchi N, Morita Y, Yokoe T, Nagasawa M, Ota T, Kawagoe S, Nakamura Y, Chosa E.
J Knee Surg 36 ( 10 ) 1095 - 1101 2023.10
Language：English Publishing type：Research paper (scientific journal)
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第2趾DIP関節脱臼に対する観血的整復術後の早期スポーツ復帰の一例 Reviewed
川越 亮, 田島 卓也, 山口 奈美, 大田 智美, 長澤 誠, 森田 雄大, 横江 琢示, 帖佐 悦男
整形外科と災害外科 72 ( 3 ) 485 - 487 2023.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：西日本整形・災害外科学会
【はじめに】観血的整復術を必要とした第2趾のDIP関節脱臼の1例を経験した．【症例】16歳男性．空手中に受傷．第2趾DIP関節脱臼で徒手整復を行ったが整復不能であったため，観血的整復術を行った．整復阻害因子は長趾屈筋腱であり，蹠側板の嵌頓は認めなかった．術後早期の競技復帰希望があったため母趾とのbuddy tapingを指示し復帰とした．術後6か月が経過し特に問題なく競技継続している．【考察】DIP関節脱臼の整復阻害因子は蹠側板や長趾屈筋腱の報告があり，本症例では長趾屈筋腱であった．また，術後のスポーツ復帰について，競技によっては症状次第で早期復帰が見込めると考えられた．
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Tmem161a regulates bone formation and bone strength through the P38 MAPK pathway Reviewed
Takuya Nagai,Tomohisa Sekimoto,Syuji Kurogi,Tomomi Ohta, Shihoko Miyazaki,Yoichiro Yamaguchi,Takuya Tajima, Etsuo Chosa,Mai Imasaka,Kumiko Yoshinobu,Yoshitaka Hishikawa,Taro Funamoto
Scientific reports ( 14639 ) 2023.9
Language：English Publishing type：Research paper (bulletin of university, research institution)
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私論 学会で発表することの意義 Reviewed
田島 卓也
整形外科 74 ( 10 ) 1072 - 1072 2023.9
Publishing type：Research paper (scientific journal) Publisher：南江堂
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Is the Small Ossicle of Type 1 Accessory Navicular a Cause of Foot Pain?-A Case Report. Reviewed
Yokoe T, Uemichi K, Tajima T, Chosa E
Medicina (Kaunas, Lithuania) 59 ( 9 ) 2023.8
Language：English Publishing type：Research paper (scientific journal)
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Is the Small Ossicle of Type 1 Accessory Navicular a Cause of Foot Pain?—A Case Report Reviewed
Takuji Yokoe,Kazushi Uemichi,Takuya Tajima,Etsuo Chosa
medicina 59 ( 9 ) 1562 2023.8
Language：English Publishing type：Research paper (bulletin of university, research institution)
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Risk factors associated with throwing injuries in young baseball players Reviewed
長澤 誠, 田島 卓也, 山口 奈美, 森田 雄大, 横江 琢示, 大田 智美, 石田 康行, 帖佐 悦男
Journal of Shoulder and Elbow Surgery 32 ( 8 ) 1673 - 1680 2023.8
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Elsevier
Background
Few studies have retrospectively analyzed the relationship between joint range of motion (ROM) and muscle flexibility and shoulder and elbow throwing injuries in a large number of elementary school baseball players. The purpose of this study was to retrospectively identify the physical factors related to shoulder and elbow throwing injuries in younger baseball players.
Methods
A total of 2466 younger baseball players belonging to our Prefecture Rubber Baseball Federation who participated in medical check-ups from 2016 to 2019 were analyzed. Players completed a questionnaire and had a medical check-up that included a physical examination and ultrasonography. ROM (internal rotation [IR] angle and external rotation angle) of the shoulder and hip and the finger-to-floor distance and heel-to-buttock distance were measured. The straight leg raise was also performed. The results of two groups (normal group and injury group) were compared using the χ2 test, Mann-Whitney U test, and Student t test. Stepwise forward logistic regression models were developed to identify risk factors.
Results
On univariate analysis, nine of the 13 evaluated items showed significant decreases in ROM and muscle flexibility in the injury group. On multiple logistic regression analysis, grade, finger-to-floor distance, IR angle of the dominant side shoulder, and IR angle of the nondominant side hip were significantly associated with the occurrence of throwing injuries. Decreased total shoulder angle was observed not only on the dominant side but also on the nondominant side in the injury group.
Conclusion
Decreased ROM and muscle flexibility were risk factors for baseball-related throwing injuries in elementary school baseball players. To prevent shoulder and elbow throwing injuries, players, coaches, medical staff, and parents need to be aware of these findings. -
Shear stress in the medial meniscus posterior root during daily activities.
Yokoe T, Ouchi K, Yamaguchi Y, Enzaki M, Tajima T, Chosa E
The Knee 43 176 - 183 2023.7
Language：English Publishing type：Research paper (scientific journal) Publisher：Knee
Background: Medial meniscus posterior root (MMPR) tears have been reported to occur in middle-aged patients with minor trauma. However, the injury mechanism of MMPR tears remains unclear. The purpose of this study was to evaluate the shear stress in the MMPR during daily activities using a finite-element analysis. Methods: Subject-specific finite-element models of the knee joint of a healthy middle-aged subject were developed from computed tomographic and magnetic resonance images. A three-dimensional motion capture system “VICON” was used to capture four daily activities: walking, jogging, descending stairs, and landing. The knee joint reaction force was estimated using the AnyBody modeling system. Based on these procedures, the shear stress in the MMPR was calculated during each motion. The shear stress in the lateral meniscus posterior root (LMPR) was also measured to compare the stress between the MMPR and LMPR. Results: The shear stress in the MMPR increased as the knee flexion angle increased during each motion. Descending stairs caused more than two-fold greater stress in the MMPR than walking and a similar or greater amount of stress than jogging. The LMPR tended to receive more shear stress than the MMPR throughout each motion. Conclusions: The present study showed that descending stairs confers almost the same amount of shear stress to the MMPR as jogging. The results of the present study may suggest that descending motion of the knee is an important cause of MMPR tear, and the initiation of descending stairs should be delayed after MMPR repair.
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宮崎式サーフィン競技安全度評価を1シーズン使用してみて Reviewed
小島岳史、柏木輝行、柏木悠吾、福嶋研人、吉田尚紀、石田翔太郎、帖佐悦男、田島卓也
九州・山口 スポーツ医・科学研究会誌 34 28 - 32 2023.7
Language：Japanese Publishing type：Research paper (conference, symposium, etc.) Publisher：Elsevier
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Shear stress in the medial meniscus posterior root during daily activities Reviewed
Takuji Yokoe,Koki Ouchi,Yoichiro Yamaguchi,Masahiro Enzaki, Takuya Tajima,Etsuo Chosa
The Knee 43 176 - 183 2023.6
Language：English Publishing type：Research paper (bulletin of university, research institution) Publisher：Elsevier
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Evaluation of Sit-to-Stand Movement in Older Adults with Locomotive Syndrome Using the Nintendo Wii Balance Board. Sensors Reviewed
Go Yamako, Niroshan G Punchihewa, Hideki Arakawa, Takuya Tajima, Etsuo Chosa
Sensors 2023.5
Language：English Publishing type：Research paper (scientific journal)
DOI： 10.3390/s23073368
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Ureter position and risk of ureteral injury during lateral lumbar interbody fusion Reviewed
Makoto Nagasawa,MD,Takuya Tajima,MD,PhD,Shuichi Kawagoe, MD,Nami Yamaguchi,MD,PhD, Yudai Morita,MD,Takuji Yokoe, MD,Tomomi Ota,MD,Toshihiko Izumi, MD, PhD,Yasuyuki Ishida, MD,Etsuo Chosa,MD,PhD
Journal of Clinical Medicine 32 ( 8 ) 1673 - 1680 2023.5
Language：English Publishing type：Research paper (bulletin of university, research institution) Publisher：Elsevier
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Imazato H, Takahashi N, Hirakawa Y, Yamaguchi Y, Hiyoshi M, Tajima T, Chosa E, Sawaguchi A
Scientific reports 13 ( 1 ) 6352 2023.4
Language：English Publishing type：Research paper (scientific journal) Publisher：Scientific Reports
Recent physiological studies have shown that the deep fascia has received much attention concerning clinical medicine; however, histological examination of the deep fascia has not been well established. In this study, we aimed to clarify and visualize the structure of the deep fascia by taking advantage of cryofixation techniques and low-vacuum scanning electron microscopy. As a result, the ultrastructural observations revealed three-dimensional stratification of the deep fascia composed of three layers: the first superficial layer consisting of collagen fibers extending in various directions with blood vessels and peripheral nerves; the second intermediate layer formed by single straight and thick collagen fibers with flexibility; and the third deepest layer, consisting of relatively straight and thin collagen fibers. We explored the use of two hooks to hold a piece of deep fascia in place through the course of cryo-fixation. A comparative observation with or without the hook-holding procedure would indicate the morphological adaptation to physiological stretch and contraction of the deep fascia. The present morphological approach paves the way to visualize three-dimensional ultrastructures for future biomedical studies including clinical pathophysiology.
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Three‑dimensional fine structures in deep fascia revealed by combined use of cryo‑fixed histochemistry and low‑vacuum scanning microscopy Reviewed
Hiroyuki Imazato,NobuyasuTakahashi,Yusuke Hirakawa, Yoichiro Yamaguchi,Masaru Hiyoshi,Takuya Tajima, Etsuo Chosa, Akira Sawaguchi
Scientific reports 13 ( 1 ) 6352 2023.4
Language：English Publishing type：Research paper (bulletin of university, research institution) Publisher：Springer
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Yamako G, Punchihewa NG, Arakawa H, Tajima T, Chosa E
Sensors (Basel, Switzerland) 23 ( 7 ) 2023.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Sensors
Standing up from a chair is a mechanically demanding daily motion, and its biomechanics represent motor performance. In older adults with locomotive syndrome (LS), sit-to-stand (STS) movement with adequate postural control is essential to prevent falls. This study evaluated the characteristics of dynamic balance during STS movement on older adults with LS. A total of 116 participants aged ≥65 years were divided into Non-LS, LS stage 1, and LS stage 2 groups using the LS risk test. The participants were instructed to stand on the Nintendo Wii Balance Board as quickly as possible, and the STS movement was quantified using the vertical ground reaction force (VGRF) and center of pressure (CoP). The STS score, which represented dynamic balance, was significantly different among the groups (p < 0.001). The rate of VGRF development was significantly lower in the LS stages 1 and 2 than in the Non-LS group (p < 0.001). On the other hand, the total distance of the CoP path did not differ among the groups (p = 0.211). These findings indicated a reduction of postural control in older adults with LS. The STS score emphasized the importance of balance training to prevent falls in older adults with LS.
DOI： 10.3390/s23073368
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Risk factors of failure results after double-bundle reconstruction with autogenous hamstring grafts for isolated posterior cruciate ligament rupture cases Reviewed
Yudai Morita,Takuya Tajima,Nami Yamaguchi,Takuji Yokoe,Makoto Nagasawa,Tomomi Ota,Kouki Ouchi,Etsuo Chosa
Scientific reports 6192 2023.3
Language：English Publishing type：Research paper (bulletin of university, research institution)
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Risk factors of failure results after double-bundle reconstruction with autogenous hamstring grafts for isolated posterior cruciate ligament rupture cases Reviewed
Yudai Morita,Takuya Tajima,Nami Yamaguchi,Takuji Yokoe,Makoto Nagasawa,Tomomi Ota,Kouki Ouchi,Etsuo Chosa
Scientific reports 6192 2023.3
Language：English Publishing type：Research paper (bulletin of university, research institution) Publisher：nature portfolio
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Yokoe T, Ouchi K, Matsumoto T, Tajima T, Chosa E
The Knee 42 57 - 63 2023.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Knee
Background: Partial meniscectomy is commonly performed for symptomatic patients with discoid lateral meniscus (DLM) if conservative treatment fails. However, the development of knee osteoarthritis and osteochondral lesion are detrimental postoperative complications. This study aimed to evaluate the effect of the volume of resected DLM on the contact stress of the tibiofemoral joint using a finite element analysis. Methods: Subject-specific finite-element models of the knee joint of a patient with DLM were developed from computed tomographic and magnetic resonance images. To evaluate the effect of partial meniscectomy on the contact stress in the lateral tibiofemoral joint, six knee models were created in the study (the native DLM, and five partially meniscectomized DLMs (according to the preserved width of the meniscus: 12 mm, 10 mm, 8 mm, 6 mm, and 4 mm)). Results: As the volume of resected DLM increased, higher contact stress was applied to the lateral tibiofemoral joint. Greater contact stress was applied to the preserved lateral meniscus than to the native DLM. Conclusions: From a biomechanical viewpoint, the native DLM was the most protective against lateral tibiofemoral contact stress in comparison to partially meniscectomized DLMs.
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Effect of the volume of resected discoid lateral meniscus on the contact stress of the tibiofemoral joint: A finite element analysis Reviewed
Takuji Yokoe, Koki Ouchi, Taisei Matsumoto, Takuya Tajima, Etsuo Chosa
The Knee 57 - 63 2023.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Elsevier
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Insertion sites of the muscles attached to the clavicle: a cadaveric study of the clavicle.
Imazato H, Takahashi N, Sawaguchi A, Hirakawa Y, Yamaguchi Y, Hiyoshi M, Tajima T, Chosa E
BMC musculoskeletal disorders 24 ( 1 ) 160 2023.3
Language：English Publishing type：Research paper (scientific journal) Publisher：BMC Musculoskeletal Disorders
Background: Clavicle fractures are common injuries, especially in young, active individuals. Operative treatment is recommended for completely displaced clavicle shaft fractures, and plate fixation is stronger than the use of intramedullary nails. Few studies have reported on iatrogenic injuries to the muscle attached to the clavicle during fracture surgery. The aim of this study was to clarify the area of the insertion sites of muscles attached to the clavicle in Japanese cadavers using gross anatomy and three-dimensional (3D) analysis. We also aimed to compare the effects of anterior plate templating and superior plate templating on clavicle shaft fractures using 3D images. Methods: Thirty-eight clavicles from Japanese cadavers were analyzed. We removed all clavicles to identify the insertion sites and measured the size of the insertion area of each muscle. Three-dimensional templating was performed on both the superior and anterior plates of the clavicle using data obtained from computed tomography. The areas covered by these plates on the muscles attached to the clavicle were compared. Histological examination was performed on four randomly selected specimens. Results: The sternocleidomastoid muscle was attached proximally and superiorly; the trapezius muscle was attached posteriorly and partly superiorly; and the pectoralis major muscle and deltoid muscles were attached anteriorly and partially superiorly. The non-attachment area was located mainly in the posterosuperior part of the clavicle. It was difficult to distinguish the borders of the periosteum and pectoralis major muscles. The anterior plate covered a significantly broader area (mean 6.94 ± 1.36 cm2) of the muscles attached to the clavicle than did the superior plate (mean 4.11 ± 1.52 cm2) (p < 0.0001). On microscopy, these muscles were inserted directly into the periosteum. Conclusion: Most of the pectoralis major and deltoid muscles were attached anteriorly. The non-attachment area was located mainly from the superior to posterior part of the clavicle midshaft. Both macroscopically and microscopically, the boundaries between the periosteum and these muscles were difficult to demarcate. The anterior plate covered a significantly broader area of the muscles attached to the clavicle than that by the superior plate.
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Insertion sites of the muscles attached to the clavicle: a cadaveric study of the clavicle Reviewed
Hiroyuki Imazato, Nobuyasu Takahashi, Akira Sawaguchi, Yusuke Hirakawa, Yoichiro Yamaguchi, Masaru Hiyoshi, Takuya Tajima & Etsuo Chosa
BMC Musculoskeletal Disorders 2023.3
Language：English Publishing type：Research paper (scientific journal) Publisher：BMC
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Yokoe T, Tajima T, Yamaguchi N, Morita Y, Chosa E
Medicina (Kaunas, Lithuania) 59 ( 3 ) 2023.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Medicina (Lithuania)
Muscle herniation of the lower extremity, such as tibialis anterior muscle herniation (TAMH), is not a rare cause of leg pain in athletes. However, a few studies have reported surgical treatment for TAMH, and the optimal surgical procedure remains controversial. Fasciotomy was reported to be effective for patients with TAMH. However, this procedure would be associated with a risk of intraoperative injury to the superficial peroneal nerve (SPN), although no previous literature has reported this complication. This case report aimed to report a case of bilateral TAMHs in which a traumatic neuroma of the SPN developed after fasciotomy. A 16-year-old baseball player presented with painful swelling lesions of the bilateral lower extremities (1 lesion on the right, 3 lesions on the left) after sports activities. An ultrasonographic evaluation showed swelling lesions of the anterolateral parts of the bilateral lower extremities in the standing position after dashing, while these lesions were not detected in the supine position. A fasciotomy of the crural fascia was performed after conservative treatment failed. Several days after surgery, the patient presented with weakened touch sensation over the dorsal area of the left foot. At the three-month follow-up examination, a swelling lesion with hard elasticity was identified. The palpation of this lesion caused a radiating sensation in the area supplied by the SPN. He was able to return to playing baseball six months after surgery. The patient was asymptomatic without palpation of the traumatic neuroma of the SPN at the latest follow-up examination. In conclusion, the present case report suggests that orthopedic surgeons need to consider the risk of iatrogenic injury to the SPN during fasciotomy for the treatment of TAMHs. However, there may be a risk of injuring the SPN because of the many variants of the course of the SPN within the compartment of the lower extremities.
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A Traumatic Neuroma Formation Following Fasciotomy for the Treatment of Tibialis Anterior Muscle Herniation:A Case Report Reviewed
Takuji Yokoe,Takuya Tajima,Nami Yamaguchi,Yudai Morita and Etsuo Chosa
medicina 2023.2
Language：English Publishing type：Research paper (scientific journal) Publisher：MDPI
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Influence of the Tibial Tunnel Angle and Posterior Tibial Slope on "Killer Turn" during Posterior Cruciate Ligament Reconstruction: A Three-Dimensional Finite Element Analysis.
Yang F, Yokoe T, Ouchi K, Tajima T, Chosa E
Journal of clinical medicine 12 ( 3 ) 2023.1
Language：English Publishing type：Research paper (scientific journal)
DOI： 10.3390/jcm12030805
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Influence of the Tibial Tunnel Angle and Posterior Tibial Slope on "Killer Turn" during Posterior Cruciate Ligament Reconstruction: A Three-Dimensional Finite Element Analysis Reviewed
Fan Yang, Takuji Yokoe, Koki Ouchi, Takuya Tajima, Etsuo Chosa
Journal of Clinical Medicine 12 ( 3 ) 805 2023.1
Language：English Publishing type：Research paper (scientific journal) Publisher：MDPI
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Okura T., Sekimoto T., Matsuoka T., Fukuda H., Hamada H., Tajima T., Chosa E.
Hand 18 ( 1_suppl ) 133S - 138S 2023.1
Language：English Publishing type：Research paper (scientific journal) Publisher：Hand
Background: The purpose of the present study was to evaluate the usefulness of the median nerve stenosis rate (MNSR) measured on sagittal sonographic images of the median nerve in the diagnosis of carpal tunnel syndrome (CTS). Methods: The study population consisted of 45 hands from 37 patients with idiopathic CTS (CTS group), and 60 hands from 35 asymptomatic healthy subjects (control group). Carpal tunnel syndrome was diagnosed by clinical findings and positive electrophysiological study results. All patients and control subjects underwent ultrasonographic examination. At the carpal tunnel level, the transducer was placed longitudinally to the median nerve, and an image of the longitudinal median nerve was obtained. The minimum median nerve diameter (MND) was measured at the middle part of the capitate level, while the maximum MND was measured at the distal radioulnar joint level. The MNSR was calculated as (1 – minimum MND/maximum MND) × 100 (%). The cross-sectional area of the median nerve was also measured at the level of the pisiform. Results: On longitudinal sonographic images, the MNSR was significantly larger in the CTS group than the control group. When the cut-off value of the MNSR was 26.73%, the sensitivity and specificity were 91.1% and 80%, respectively. The area under the receiver operating characteristic curve was larger for the MNSR than for the cross-sectional area. Conclusion: The results suggest that the MNSR proposed in the present study may be useful as an auxiliary method for CTS diagnosis on ultrasonographic examination.
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Efficacy of Diagnosing Carpal Tunnel Syndrome Using the Median Nerve Stenosis Rate Measured on Ultrasonographic Sagittal Imagery: Clinical Case-Control Study. Reviewed
Toshiyuki Okura, Tomohisa Sekimoto, Tomomi Matsuoka, Hajime Fukuda, Hiroaki Hamada, Takuya Tajima, Etsuo Chosa.
Hand (NY) 18 ( 1_suppl ) 133S - 138S 2023.1
Language：English Publishing type：Research paper (scientific journal) Publisher：SAGE Publishing
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Nakatake J., Arakawa H., Tajima T., Miyazaki S., Chosa E.
PeerJ 11 e16571 2023
Language：English Publishing type：Research paper (scientific journal) Publisher：PeerJ
Background: The objective kinematic assessments of activities of daily living are desired. However, the limited knowledge regarding age- and sex-related differences prevents the adaptation of these measurements to clinical settings and in-home exercises. Therefore, this study aimed to determine the effects of age and sex on joint and endpoint kinematics during a common activity of daily living, specifically, drinking from a glass. Methods: In total, 32 healthy adults (18 males and 14 females) aged 22–77 years performed a drinking task comprising reaching for a glass, bringing it forward and sipping, returning it, and placing the hand back to the starting position, which was recorded using a three-dimensional motion-capturing system. A two-way analysis of variance was used to statistically compare joint angles at five different time points and endpoint kinematic variables in the four drinking phases between older and younger age groups and sexes. Results: Wrist radial deviation was greater in older adults than in younger participants at all five different time points (F = 5.16–7.34, p ≤ 0.03, η2 = 0.14–0.21). Moreover, lesser shoulder abduction and greater shoulder internal rotation and forearm pronation when moving and returning the hand to the starting position were observed in the female group than in the male group (F = 4.21–20.03, p ≤ 0.0497, η2 = 0.13–0.41). Trunk flexion was lower in the female group than in the male group at all time points (F = 4.25–7.13, p ≤ 0.0485, η2 = 0.12–0.19). Regarding endpoint kinematics, the performance time in the reaching phase was longer in older adults than in younger individuals (F = 4.96, p = 0.03, η2 = 0.14). Furthermore, a shorter time while returning the hand to the starting position was observed in the female group than in the male group (F = 9.55, p < 0.01, η2 = 0.22). Conclusions: The joint kinematics of drinking were partially characterized by an age effect, whereas endpoint kinematics were scattered in all drinking phases. Sex-related effects in most upper-body motions and postures may cause rapid motions in females. Therefore, clinicians could use this knowledge for precise assessments and to suggest feasible in-home exercises.
DOI： 10.7717/peerj.16571
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Risk factors associated with throwing injuries in young baseball players
Nagasawa M., Tajima T., Kawagoe S., Yamaguchi N., Morita Y., Yokoe T., Ota T., Izumi T., Ishida Y., Chosa E.
Journal of Shoulder and Elbow Surgery 32 ( 8 ) 1673 - 1680 2023
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Shoulder and Elbow Surgery
Background: Few studies have retrospectively analyzed the relationship between joint range of motion (ROM) and muscle flexibility and shoulder and elbow throwing injuries in a large number of elementary school baseball players. The purpose of this study was to retrospectively identify the physical factors related to shoulder and elbow throwing injuries in younger baseball players. Methods: A total of 2466 younger baseball players belonging to our Prefecture Rubber Baseball Federation who participated in medical check-ups from 2016 to 2019 were analyzed. Players completed a questionnaire and had a medical check-up that included a physical examination and ultrasonography. ROM (internal rotation [IR] angle and external rotation angle) of the shoulder and hip and the finger-to-floor distance and heel-to-buttock distance were measured. The straight leg raise was also performed. The results of two groups (normal group and injury group) were compared using the χ2 test, Mann-Whitney U test, and Student t test. Stepwise forward logistic regression models were developed to identify risk factors. Results: On univariate analysis, nine of the 13 evaluated items showed significant decreases in ROM and muscle flexibility in the injury group. On multiple logistic regression analysis, grade, finger-to-floor distance, IR angle of the dominant side shoulder, and IR angle of the nondominant side hip were significantly associated with the occurrence of throwing injuries. Decreased total shoulder angle was observed not only on the dominant side but also on the nondominant side in the injury group. Conclusion: Decreased ROM and muscle flexibility were risk factors for baseball-related throwing injuries in elementary school baseball players. To prevent shoulder and elbow throwing injuries, players, coaches, medical staff, and parents need to be aware of these findings.
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Medical Support for Rugby Sevens in Tokyo2020+1 Olympic Games Reviewed
Tajima Takuya, Chosa Etsuo, Nakamura Akihiko
Japanese Journal of Orthopaedic Sports Medicine 43 ( 3 ) 105 - 110 2023
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Orthopaedic Socety for Sports Medicine
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Nishio M., Nonaka N., Fujihira R., Murakami H., Tajima T., Yamada M., Maeda A., Seita J.
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 13859 LNAI 215 - 228 2023
Publishing type：Research paper (scientific journal) Publisher：Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
To provide suitable care for concussion, objective and timely detection of high-risk event is crucial. Currently it depends on monitoring by medical doctors, and there is a certain risk of missing high-risk events. A few attempts introducing video analysis have been reported, but those approaches require labeling by experts, which is skill-dependent, and time and cost consuming. To achieve objective detection of high-risk tackle without human intervention, we developed a method combining pose estimation by deep learning and pose evaluation by machine learning. From match videos of Japan Rugby Top League in 2016–2018 seasons, 238 low-risk tackles and 155 high-risk tackles were extracted. Poses of tackler and ball carrier were estimated by deep learning, then were evaluated by machine learning. The proposed method resulted AUC 0.85, and outperformed the previously reported rule-based method. Also, the features extracted by the machine learning model, such as upright positions of tackler/ball carrier, tackler’s arm dropped in extended position, were consistent with the known risk factors of concussion. This result indicates that our approach combining deep learning and machine learning opens the way for objective and timely detection of high-risk events in rugby and other contact sports.
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Ureter position and risk of ureteral injury during lateral lumbar interbody fusion
Hamanaka H., Tajima T., Kurogi S., Higa K., Nagai T., Kuroki T., Takamori H., Mukai S., Kamoto T., Chosa E.
Journal of Orthopaedic Science 2023
Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Orthopaedic Science
Background: Ureteral injury during lateral lumbar interbody fusion (LLIF) is uncommon. However, it is a serious complication that may require additional surgery should it occur. The objective of this study was to evaluate whether there was any change in the position of the left ureter between preoperative biphasic contrast-enhanced CT scanned in the supine position and intraoperative scanning in the right lateral decubitus position after stent placement, to assess the risk of ureteral injury in the actual surgical position. Methods: The position of the left ureter scanned with the O-arm navigation system with the patient in the right lateral decubitus position and its position on preoperative biphasic contrast-enhanced CT images scanned with the patient in the supine position were investigated comparing their positions at the L2/3, L3/4, and L4/5 levels. Results: The ureter was located along the interbody cage insertion trajectory in 25 of 44 disc levels (56.8%) in the supine position, but in only 4 (9.5%) in the lateral decubitus position. The proportion of patients in whom the left ureter was located lateral to the vertebral body (along the LLIF cage insertion trajectory) at each level was 80% in the supine position and 15.4% in the lateral decubitus position at the L2/3 level, 53.3% in the supine position and 6.7% in the lateral decubitus position at the L3/4 level, and 33.3% in the supine position and 6.7% in the lateral decubitus position at the L4/5 level. Conclusion: The proportion of patients in whom the left ureter was located on the lateral surface of the vertebral body when the patient was in the actual surgical position (lateral decubitus position) was 15.4% at the L2/3 level, 6.7% at the L3/4 level, and 6.7% at the L4/5 level, suggesting that caution is required during LLIF surgery.
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交通外傷による下腿切断症例における膝関節靭帯断裂と義肢歩行に関する研究－遷延する歩行障害と社会復帰の改善および変形性膝関節症予防を目指して. Reviewed
田島卓也
医研センタージャーナル 5 - 14 2023
Language：Japanese Publishing type：Research paper (scientific journal)
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Risk Factors of Loss of Knee Range of Motion after Primary Anterior Cruciate Ligament Reconstruction following Preoperative Recovery of Knee Range of Motion Reviewed
Takuji Yokoe, Takuya Tajima, Nami Yamaguchi, Yudai Morita, Etsuo Chosa
The Journal of Knee Surgery 2022.12
Language：English Publishing type：Research paper (scientific journal) Publisher：Thieme
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Yokoe T., Tajima T., Kawagoe S., Yamaguchi N., Morita Y., Chosa E.
BMC Musculoskeletal Disorders 23 ( 1 ) 887 2022.12
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：BMC Musculoskeletal Disorders
Background: A number of studies have evaluated risk factors for lateral ankle sprain (LAS) or chronic lateral ankle instability (CLAI). However, the definitive risk factors for LAS or CLAI remain controversial. The purpose of this study was to evaluate whether the contralateral healthy ankles of subjects with ipsilateral mechanical lateral ankle laxity (group I) show greater lateral ankle laxity in comparison to the healthy ankles of bilateral healthy controls (group B). Methods: From March 2020, anterior talofibular ligament (ATFL) lengths of young adult volunteers were cross-sectionally measured in non-stress and stress positions using a previously reported stress ultrasonography (US) procedure. The ATFL ratio (the ratio of stress ATFL/non-stress ATFL length) was calculated as an indicator of lateral ankle laxity. The manual anterior drawer test (ADT) was also performed. The US findings of healthy ankles from groups I and B were compared. Results: A total of 154 subjects in group B (mean age, 24.5 ± 2.8 years; male/female, 84/70) and 40 subjects in group I (mean age, 24.4 ± 2.3 years; male/female, 26/14) were included in the study. There was no significant difference in the ADT between the groups. There were no significant differences in the non-stress ATFL length (19.4 ± 1.8 vs. 19.3 ± 1.9, p = 0.84), stress ATFL length (20.8 ± 1.8 vs. 20.9 ± 1.9, p = 0.66), length change (1.5 ± 0.6 vs. 1.6 ± 0.6, p = 0.12) and ATFL ratio (1.08 ± 0.03 vs. 1.08 ± 0.03, p = 0.13) between the groups. Conclusion: No significant difference was detected between the contralateral healthy ankles of subjects with ipsilateral mechanical lateral ankle laxity and those of bilateral healthy controls.
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The Results of Orthopaedic Medical Examinations in Adolescent Amateur Weightlifters
Yokoe T., Tajima T., Yamaguchi N., Nagasawa M., Morita Y., Chosa E.
International Journal of Environmental Research and Public Health 19 ( 21 ) 2022.11
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：International Journal of Environmental Research and Public Health
Few studies have reported injuries and physical characteristics in adolescent weightlifters. The purpose of this study was to report the results of orthopaedic medical examinations in adolescent amateur weightlifters that were performed cross-sectionally from 2012 to 2019. The orthopaedic medical examination included physical examinations, generalized joint laxity, muscle and joint tightness, static alignment, muscle volume of the lower extremities, and medial longitudinal arch of the foot (the height from the tip of the navicular tubercle to the ground surface). A questionnaire survey regarding pain in the spine and lower extremities was also performed. A total of 99 adolescent weightlifters were included (male/female, 71/28; mean age, 16.2 ± 0.2 years). A total of 9.1% had received orthopaedic treatments, with spine injuries being the most prevalent. Of those who had not received orthopaedic treatments, 31.1% had pain in the spine or lower extremities (for >4 weeks). There were no significant gender differences in the incidence of pain or positive findings of physical examinations. Female weightlifters had a more reduced dorsiflexion of the ankle joint than male weightlifters (p = 0.02). Male weightlifters had a lower flexibility of the quadriceps than female weightlifters. The results of orthopaedic medical examinations in this study may help clinicians and young weightlifters to prevent injuries in competitive weightlifting.
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The Results of Orthopaedic Medical Examinations in Adolescent Amateur Weightlifters Reviewed
Takuji Yokoe, Takuya Tajima, Nami Yamaguchi, Makoto Nagasawa, Yudai Morita, Etsuo Chosa
International Journal of Environmental Research and Public Health 19 ( 21 ) 13947 2022.10
Language：English Publishing type：Research paper (scientific journal) Publisher：MDPI
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The Results of Orthopaedic Medical Examinations in Adolescent Amateur Weightlifters Reviewed
Takuji Yokoe,Takuya Tajima,Nami Yamaguchi,Makoto Nagasawa,Yudai Morita and Etsuo Chosa
International Journal of Environmental Research and Public Health 19 13947 2022.10
Language：English Publishing type：Research paper (scientific journal) Publisher：International Journal fo Environmental Research and Public Health
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Yokoe T, Tajima T, Yamaguchi N, Morita Y, Chosa E
Medicina (Kaunas, Lithuania) 58 ( 11 ) 2022.10
Language：English Publishing type：Research paper (scientific journal) Publisher：Medicina (Lithuania)
Osteochondral lesion (OCL) of the patellofemoral (PF) joint is not an uncommon cause of knee pain, and surgery is needed when conservative treatment fails. However, there is a lack of evidence regarding the optimal surgical treatment for OCL of the PF joint. Fixation of OCLs using autogenous osteochondral grafts has been reported to be effective for OCL of the knee. However, in this surgical technique, the biomechanical strength of osteochondral grafts may not be sufficient in patients with open physes due to the specific quality of the cartilage and subchondral bone given their age. There is a lack of studies reporting fixation of the OCL located in the PF joint using autogenous osteochondral grafts. We herein report a case of OCL of the femoral intercondylar groove where autogenous osteochondral grafts augmented with bioabsorbable pins were used to fix the lesion in a 14-year-old patient with open physes. Preoperative MRI revealed a completely detached OCL of the intercondylar groove (36 mm × 20 mm). Although a total of four osteochondral grafts were harvested from the non-weightbearing area of the lateral femoral condyle, cartilage detached from one of the grafts. The quality of the osteochondral grafts was considered to be insufficient for stabilization of the OCL; thus, two bioabsorbable pins were additionally inserted following fixation of the lesion using three osteochondral grafts. After two years of follow-up, postoperative functional scores were favorable without knee pain. The present case suggests that fixation of the OCL using autogenous osteochondral grafts may not be appropriate for young patients with open physes.
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Fixation of an Osteochondral Lesion of the Femoral Intercondylar Groove Using Autogenous Osteochondral Grafts and Bioabsorbabale Pins in a Patient with Open Physes:A Case Report Reviewed
Takuji Yokoe,Takuya Tajima,Nami Yamaguchi,Yudai Morita and Etsuo Chosa
medicina 2022.10
Language：English Publishing type：Research paper (scientific journal) Publisher：MDPI
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足部びまん性色素性絨毛結節性滑膜炎に対し，関節鏡下腫瘍切除術を施行した一例
外山 宗樹, 横江 琢示, 田島 卓也, 山口 奈美, 大田 智美, 長澤 誠, 森田 雄大, 川越 秀一, 帖佐 悦男
整形外科と災害外科 71 ( 4 ) 725 - 729 2022.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：西日本整形・災害外科学会
【背景】色素性絨毛結節性滑膜炎（Pigmented villonodular Synovitis, PVS）は関節滑膜や腱鞘に発生する比較的稀な良性腫瘍である．多くは膝関節周囲に発生し，足関節発生症例は稀である．今回，足部びまん性PVSに対して関節鏡下腫瘍切除術を行い，良好な短期成績を得た一例を経験したので報告する．【症例】23歳女性．数年前から左足部外側に腫瘤を自覚していたが，放置していた．しかしながら，腫瘤の消退を認めず前医を受診し，PVSの疑いで当科紹介となった．当科では関節鏡下腫瘍切除術を施行した．足関節前方および後足部鏡視下併用で足関節，足関節周囲，距骨下に病変を認め，関節鏡視下に腫瘍を切除した．術後病理診断ではびまん性PVSの診断であった．術後26ヶ月経過し，再発なく経過している．【結語】足部びまん性PVSに対し，足関節前方および後足部鏡視下併用での関節鏡下腫瘍切除術を施行し，良好な短期成績を得た一例を経験した．
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足部びまん性色素性絨毛結節性滑膜炎に対し，関節鏡下腫瘍切除術を施行した一例 Reviewed
外山 宗樹,横江 琢示,田島 卓也,山口 奈美,大田 智美,長澤 誠,森田 雄大,川越 秀一,帖佐 悦男
整形外科と災害外科 71 ( 4 ) 725 - 729 2022.9
Language：Japanese Publishing type：Research paper (other academic) Publisher：西日本整形・災害外科学会
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Head Injury Assessment in the Elite Level Rugby Union in Japan: Review of 3 Seasons
Tajima T., Ota O., Nagayama M., Takahashi M., Yamada M., Ishiyama N., Yoshida I., Takemura M., Hara K., Akama T., Mitsumori N., Higashihara J., Toyama Y., Furuya M., Chosa E., Nakamura A.
International Journal of Sports Medicine 43 ( 10 ) 889 - 894 2022.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：International Journal of Sports Medicine
Head Injury Assessment (HIA) is the screening tool for head injury during a rugby game. The purpose of this study was to investigate the epidemiology of HIA in the Japan Rugby Top League (JRTL). The incidences of HIA, defined concussion (per 1,000 player-hours) and repeated concussions were evaluated in three seasons (2016-17, 2017-18, 2018-19; total 360 games). The HIA incidence rates were 12.7 (95% confidence interval 9.5-15.9), 20.8 (16.8-24.9), and 25.0 (20.5-29.5) in each season. HIA-1 criteria 2, which is applied for suspected concussion cases, was performed for 46 cases in the 2016-17 season, 81 cases in the 2017-18 season, and 88 cases in the 2018-19 season. The concussion incidence rates were significantly greater in the 2017-18 season (9.6/1000 player-hours, 95% confidence interval 6.8-12.4) and the 2018-19 season (14.4, 11-17.8) compared to the 2016-17 season (4.8, 2.8-6.8). The number of repeated concussion cases in the same season was 1 in the 2016-17 season and 4 in both the 2017-18 and 2018-19 seasons. This study confirmed significantly higher HIA and concussion incidence rates over time. Although the HIA system might have been established in the three seasons in JRTL, comprehensive management needs to be improved to prevent repeated concussions.
DOI： 10.1055/a-1810-6509
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健常者スポーツ，パラスポーツの相互理解を目指して‐合同メディカルチェックの試み- Reviewed
喜多恒允，田島卓也，横江琢示，森田雄大，長澤誠，山口奈美，帖佐悦男
日本臨床スポーツ医学会誌 30 ( 3 ) 695 - 702 2022.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：日本臨床スポーツ医学会
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宮崎県の高校ラグビーにおけるメディカルサポート－３年間の外傷調査－ Reviewed
森田 恭史,今里 浩之,岩佐 一真,横江 琢示,森田 雄大,比嘉 聖,山口 奈美,中村 嘉宏,田島 卓也,帖佐 悦男,吉川 大輔
九州・山口スポーツ医・科学研究会誌 33 37 - 40 2022.7
Language：Japanese Publishing type：Research paper (conference, symposium, etc.) Publisher：九州・山口スポーツ医・科学研究会
我々は宮崎県で開催されるラグビーの公式戦で要請のあった全試合にマッチデイドクター配備および後方支援病院を整備している．今回，15人制高校ラグビー宮崎県大会の外傷調査を行ったため報告する．
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サーフィン競技会における医療体制の向上と重症事故発生予防を目的とした安全評価法の作成 Reviewed
石田 翔太郎,小島 岳史,帖佐 悦男,田島 卓也
九州・山口スポーツ医・科学研究会誌 33 6 - 11 2022.7
Language：Japanese Publishing type：Research paper (conference, symposium, etc.) Publisher：九州・山口スポーツ医・科学研究会
サーフィンは海上競技であり，陸上競技では助かる脳震盪でさえも死亡事故につながってしまう．そのため安全に競技会を開催するためにはドクター派遣だけではなくライフセーバー，救急車や後方支援病院との連携，AEDの設置が必要となる．しかし現在このような安全対策ができている競技会は少ない．今回安全度向上を目的としてサーフィン競技会専用の宮崎式安全評価法を作成した．
宮崎県では過去10年間で12例のサーフィン中（競技会外）の死亡例が発生しており，競技会中も重大事故が発生しうる．今回作成した評価法を今後の競技会で継続的に使用し、医療体制の向上に努める必要があると考える． -
Miyazaki Shihoko, Funamoto Taro, Sekimoto Tomohisa, Kurogi Syuji, Ohta Tomomi, Nagai Takuya, Tajima Takuya, Imasaka Mai, Yoshinobu Kumiko, Araki Kimi, Araki Masatake, Choijookhuu Narantsog, Hishikawa Yoshitaka, Chosa Etsuo
ACTA HISTOCHEMICA ET CYTOCHEMICA 55 ( 3 ) 99 - 110 2022.6
Language：English Publishing type：Research paper (scientific journal) Publisher：JAPAN SOCIETY OF HISTOCHEMISTRY AND CYTOCHEMISTRY
Epithelial protein lost in neoplasm (EPLIN) is an actin-associated cytoskeletal protein that plays an important role in epithelial cell adhesion. EPLIN has two isoforms: EPLINα and EPLINβ. In this study, we investigated the role of EPLINβ in osteoblasts using EPLINβ-deficient (<i>EPLINβ<sup>GT/GT</sup></i>) mice. The skeletal phenotype of <i>EPLINβ<sup>GT/GT</sup></i> mice is indistinguishable from the wildtype (WT), but bone properties and strength were significantly decreased compared with WT littermates. Histomorphological analysis revealed altered organization of bone spicules and osteoblast cell arrangement, and decreased alkaline phosphatase activity in <i>EPLINβ<sup>GT/GT</sup></i> mouse bones. Transmission electron microscopy revealed wider intercellular spaces between osteoblasts in <i>EPLINβ<sup>GT/GT</sup></i> mice, suggesting aberrant cell adhesion. In <i>EPLINβ<sup>GT/GT</sup></i> osteoblasts, α- and β-catenins and F-actin were observed at the cell membrane, but OB-cadherin was localized at the perinuclear region, indicating that cadherin-catenin complexes were not formed. EPLINβ knockdown in MC3T3-e1 osteoblast cells showed similar results as in calvaria cell cultures. Bone formation markers, such as <i>RUNX2</i>, <i>Osterix</i>, <i>ALP</i>, and <i>Col1a1</i> mRNA were reduced in EPLINβ knockdown cells, suggesting an important role for EPLINβ in osteoblast formation. In conclusion, we propose that EPLINβ is involved in the assembly of cadherin-catenin complexes in osteoblasts and affects bone formation.
DOI： 10.1267/ahc.22-00027
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EPLINβ Is Involved in the Assembly of Cadherin-catenin Complexes in Osteoblasts and Affects Bone Formation Reviewed
Shihoko Miyazaki, Taro Funamoto, Tomohisa Sekimoto, Syuji Kurigi, Tomomi Ohta, Takuya Nagai, Takuya Tajima, Mai Imasaka, Kumiko Yoshinobu, Kimi Araki, Masatake Asaki, Narantsog Choijookhuu, Yoshitaka Hishikawa, Etsuo Chosa
ACTA HISTOCHEMICA ET CYTOCHEMICA 55 ( 3 ) 99 - 110 2022.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Japan Society of Histochemistry and Cytochemistry
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Remnant-Rreserved Single-Bundle Anterior Cruciate Ligament Augmentation in Multi-ligamentous Knee Reconstruction Reviewed
Takuya Tajima,MD, PhD NamiYamaguchi,MD,PhD Yudai Morita,MD Takuji Yokoe,MD Makotot Nagasawa,MD Tomomi Ota,MD Shuichi Kawagoe,MD Yoshihiro Nakamura, MD Etsuo Chosa,MD,PhD
The Journal of Knee Surgery 2022.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Thieme Medical Publishers,Inc.
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特集 スポーツ外傷･障害の予防と治療--TOKYO 2020が終了して 成長期のスポーツ障害の予防と早期発見のポイント Reviewed
田島 卓也, 帖佐 悦男
医学のあゆみ 281 ( 8 ) 812 - 814 2022.5
Authorship：Lead author, Corresponding author Publishing type：Research paper (scientific journal) Publisher：医歯薬出版
DOI： 10.32118/ayu28108812
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Elective one-stage all four-ligament reconstruction after open knee dislocation: A case report Reviewed
Takuji Yokoe, Takuya Tajima, Nami Yamaguchi, Etsuo Chosa
Journal of Orthopaedic Science 27 ( 3 ) 743 - 749 2022.5
Language：English Publishing type：Research paper (scientific journal) Publisher：Elsevier
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A longer duration from injury to surgery is associated with preoperative deterioration of an isolated meniscal tear in patients aged 40 years or older Reviewed
Takuji Yokoe, Takuya Tajima, Nami Yamaguchi, Yudai Morita, Etsuo Chosa
Journal of Orthopaedic Surgery (Hong Kong) 30 ( 2 ) 10225536221101692 2022.5
Language：English Publishing type：Research paper (scientific journal) Publisher：SAGE Publishing
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Yokoe T., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Journal of Orthopaedic Surgery 30 ( 2 ) 2022.5
Publishing type：Research paper (scientific journal) Publisher：Journal of Orthopaedic Surgery
Purpose: To evaluate the preoperative deterioration of an isolated meniscal tear in patients aged 40 years or older, and whether time from injury to surgery is associated with worsening of a meniscal tear. Methods: Patients aged 40 years or older who underwent arthroscopic surgery for isolated meniscal tear between 2014 and 2019 were retrospectively reviewed. The diagnostic magnetic resonance imaging (MRI) findings and arthroscopic findings were compared to evaluate the deterioration of meniscal tears. Predictors of the development of meniscal tears; patient demographic factors, duration from injury to surgery (injury to MRI and MRI to surgery), and image findings were assessed. Results: A total of 58 patients (58 knees) were included (mean age, 55.9 ± 8.5 years; male/female, 31/27). An isolated meniscal tear deteriorated in 28 (48.3%). Compared patients with and without deteriorated meniscal tear, significant differences were found in the MRI grade of meniscal tear (p = 0.03), duration from injury to MRI (164.2 ± 167.9 vs 45.2 ± 48.7 days, p < 0.001), and from MRI to surgery (148.8 ± 91.1 vs 67.6 ± 56.7 days, p < 0.001). A multivariate regression analysis showed that the duration from injury to MRI (odds ratio [OR], 1.03; p < 0.001) and from MRI to surgery (OR, 1.02; p < 0.001) were independent predictors. Conclusion: Approximately 50% of isolated meniscal tears deteriorated preoperatively in patients aged 40 years or older. The duration from injury to surgery was an independent predictor of worsening of an isolated meniscal tear.
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Yokoe T., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Journal of Clinical Medicine 11 ( 7 ) 2022.4
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Clinical Medicine
The Beighton score (BS) is widely used to evaluate generalized joint laxity. However, the association between the BS and lateral ankle laxity is unclear. This study compared the ultrasono-graphic (US) findings of the anterior talofibular ligament (ATFL) between high-(≥6) and low-(≤3) BS groups of healthy young women. The ATFL lengths of healthy young women were measured in the stress and nonstress positions using the previously reported technique from March 2021 to January 2022. The ATFL ratio (ratio of stress to nonstress ATFL length) was used as an indicator of lateral ankle laxity. The anterior drawer test (ADT) was performed. The correlation between the BS and US findings was also examined. A total of 20 (high-BS group) and 61 (low-BS group) subjects with a mean age of 23.8 ± 1.0 years were included. The high-BS group showed a higher grade of ADT than the low-BS group. No significant differences were found in the nonstress and stress ATFL lengths and ATFL ratio (1.10 ± 0.05 vs. 1.09 ± 0.05, p = 0.19) between the groups. No correlation was found between the BS and US findings. In conclusion, this study did not detect significant differences in the US findings of the ATFL between the high-and low-BS groups.
DOI： 10.3390/jcm11071759
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Symptomatic discoid lateral meniscus shows a relationship between types and tear patterns, and between causes of clinical symptom onset and the age distribution Reviewed
Nami Yamaguchi, Etsuo Chosa, Takuya Tajima, Yudai Morita, Takuji Yokoe
Knee Surgery, Sports Traumatology, Arthroscopy 30 ( 4 ) 1436 - 1442 2022.4
Language：English Publishing type：Research paper (scientific journal) Publisher：European Society of Sports Traumatology, Knee Surgery and Arthroscopy
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Effect of total hip arthroplasty on improving locomotive syndrome in hip disease patients: A prospective cohort study focused on total clinical decision limits stage 3
Miyazaki S, Tsuruta K, Yoshinaga S, Yamaguchi Y, Fujii Y, Arakawa H, Ochiai M, Kawaguchi T, Unoki A, Sakamoto T, Tajima T, Nakamura Y, Funamoto T, Hiyoshi M, Chosa E
Journal of Orthopaedic Science 2022.3
Publishing type：Research paper (scientific journal)
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Yokoe T., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Knee Surgery, Sports Traumatology, Arthroscopy 31 ( 5 ) 1994 - 2000 2022
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Knee Surgery, Sports Traumatology, Arthroscopy
Purpose: This study aimed to evaluate the relationship between generalized joint laxity (GJL) and stress ultrasonographic (US) findings of the anterior talofibular ligament (ATFL) of healthy young men. Methods: The ATFL lengths of healthy young men were consecutively measured in the stress and nonstress positions. The ATFL ratio was calculated as an indicator of lateral ankle laxity. GJL was evaluated using the Beighton score (BS), and a BS of ≥ 5 was considered GJL. The manual anterior drawer test (ADT) was also performed. The results of stress US and ADT were compared between subjects with and without GJL, and the correlation between GJL and US findings was examined. Results: A total of 13 subjects with GJL and 95 without GJL were included in the study. The mean BSs in the GJL and no-GJL groups were 5.9 ± 0.9 and 1.1 ± 1.3, respectively (p < 0.0001). The GJL group showed a higher grade of ADT than the no-GJL group (p < 0.0001). Significant differences were found in the stress ATFL length (23.6 ± 1.8 mm vs. 21.7 ± 1.8 mm, p = 0.002) and ATFL ratio (1.15 ± 0.06 vs. 1.07 ± 0.03, p < 0.0001) between the GJL and no-GJL groups. Spearman’s correlation coefficients showed a moderate correlation between the BS and ATFL ratio (r = 0.45, p < 0.0001). Conclusion: The present study showed significant differences in the ATFL ratio and stress ATFL length between young men with and without GJL. The BS was moderately correlated with the lateral ankle laxity in this population. Level of evidence: Level IV.
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Yokoe T., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Journal of Knee Surgery 36 ( 13 ) 1365 - 1373 2022
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Knee Surgery
The loss of knee range of motion (ROM) is not an uncommon complication after anterior cruciate ligament reconstruction (ACLR). However, the risk factors of loss of knee ROM remain debatable. The purpose of this study was to evaluate the incidence and risk factors of loss of knee ROM at 12 months after primary ACLR performed after regaining full knee ROM preoperatively. Consecutive patients who underwent primary ACLR after regaining full ROM between January 2014 and January 2020 were retrospectively reviewed. Patients who received a surgical arthrolysis within 12 months after ACLR or those who had a loss of knee ROM at 12 months postoperatively were defined as the loss of ROM group. Possible risk factors of loss of knee ROM, including patient demographic, preoperative, surgical, and postoperative factors, were assessed. The notch wide index and radiographic parameters of the tibial spines; medial tibial spine height (MTSH)/tibial length (TL), lateral tibial spine height (LTSH)/TL, and tibial spine width (TSW)/TL, were also assessed. A total of 141 patients (141 knees) were included (mean age, 25.8 ± 11.4 years; male/female, 56/85). Of the 141 patients, 3 received surgical arthrolysis within 12 months, and 23 had a loss of knee ROM at 12 months after ACLR. Compared patients with and without loss of knee ROM, significant differences were found in the age (p = 0.04), LTSH/TL (p = 0.02), and TSW/TL (p = 0.02). A multivariate regression analysis showed that the age (odds ratio [OR]; 1.05, 95% confidence interval [CI]: 1.01-1.09, p = 0.02), LTSH/TL (OR: 1.44, 95% CI: 1.01-2.1, p = 0.04), and TSW/TL (OR: 0.79, 95% CI: 0.65-0.97, p = 0.02) were identified as significant independent risk predictors of loss of knee ROM. This study showed that the incidence of loss of knee ROM at 12 months after primary ACLR was 18.4% (26/141). An older age, a higher LTSH/TL and a smaller TSW/TL may be associated with loss of knee ROM at 12 months after ACLR.
DOI： 10.1055/a-1934-0776
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Objective detection of high-risk tackle in rugby by combination of pose estimation and machine learning
NISHIO Monami, NONAKA Naoki, FUJIHIRA Ryo, MURAKAMI Hidetaka, TAJIMA Takuya, YAMADA Mutsuo, MAEDA Akira, SEITA Jun
人工知能学会全国大会論文集 JSAI2022 ( 0 ) 1S5IS2a05 - 1S5IS2a05 2022
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：一般社団法人 人工知能学会
To provide suitable care for concussion, objective and timely detection of high-risk tackle is crucial in the field of contact sports, such as rugby. Currently it depends on monitoring by match officials, and there is a certain risk of missing high-risk events. A few attemps introducing video analysis have been reported, but those approaches require labeling by experts, which is skill-dependent, and also time and cost consuming. To achieve objective and timely detection of high-risk tackle, we developed a method combining pose estimation by deep-learning and pose evaluation by machine learning. From match videos of Japan Rugby Top League in 2016~2018 seasons, 238 low-risk tackle and 155 high-risk tackle were extracted. Poses of tackler and ball carrier were estimated by deep learning, then were evaluated by machine learning. The proposed method resulted AUROC-score 0.85 and outperformed the previously reported rule-based method. Also, the features extracted by the machine learning model, such as upright positions of tackler/ball carrier, tackler's arm dropped in extended position, were consistent with the known risk factors. This result indicates that our approach combining deep-learning and machine learning opens the way for objective and real-time detection of high-risk tackle in rugby and other contact sports.
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End-to-End High-Risk Tackle Detection System for Rugby Reviewed
Nonaka N., Fujihira R., Nishio M., Murakami H., Tajima T., Yamada M., Maeda A., Seita J.
IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops 2022-June 3549 - 3558 2022
Publishing type：Research paper (scientific journal) Publisher：IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops
Reducing risk of severe injury such as concussion is a high priority for any contact sports. In rugby, Head Injury Assessment (HIA) protocol has been introduced to identify and protect players showing symptoms of concussion and having potential risk of concussion. However, on-field decisions by officials are sometimes difficult and subjective, and HIA is affordable only for elite leagues since it requires medical specialists. To make rugby matches more safe, we aim to develop a system to detect high-risk tackles, potential triggers of concussion, based on deep learning models. Our system takes rugby match video, then first identifies frame with tackle, subsequently detects location of tackle and estimate pose of the ball carrier and the tackler, and finally evaluate the risk of tackle using posture pair of players. Among the model combinations we have examined, the best performance was achieved with the combination of ResNet (2+1)D as tackle frame selection model, RetinaNet as tackle detection model and CenterTrack as pose estimation model. Evaluation using test data, a set of short clips from broadcasted rugby match videos, showed our system was able to detect 50% of high-risk tackles without any human intervention. This result opens a path for automated systems to detect high-risk events, leading to less expensive and more objective monitoring not only for rugby but also for any contact sports.
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End-to-End High-Risk Tackle Detection System for Rugby. 2022 IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW), New Orleans, LA, USA, 2022 Reviewed
Nonaka N, Fujihira R, Nishio M, Murakami H, Tajima T, Yamada M, Maeda A, Seita J
CVPR 2022
Language：English Publishing type：Research paper (scientific journal)
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Head Injury Assessment in the Elite Level Rugby Union in Japan:Review of 3 Seasons Reviewed
Takuya Tajima,Osamu Ota,Masataka Nagayama,Masayasu Takahashi,Mutsuo Yamada,Nobuo Ishiyama,Ichiro Yoshida,Masahiro Takemura,Kenji Hara,et al
International Journal of Sports Medicine 2022
Language：English Publishing type：Research paper (scientific journal) Publisher：Thieme
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Does the contralateral healthy ankle of patient with ipsilateral mechanical lateral ankle laxity show greater lateral ankle laxith? Evaluation of the anterior talofibular ligament by stress ultrasonography Reviewed
Takuji Yokoe,Takuya Tajima,Shuichi Kawagoe,Nami Yamaguchi,Yudai Morita and Etsuo Chosa
BMC Musculoskeletal Disorders 23 ( 1 ) 887 2022
Language：English Publishing type：Research paper (scientific journal) Publisher：BMC
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Clinical and Radiographic Outcomes of Double-Bundle Anterior Cruciate Ligament Reconstruction for Asian Patients with Bone-Patellar Tendon-Bone and Gracilis Tendon Grafts: A Matched-Control Comparison
Takuya Tajima, Nami Yamaguchi, Yudai Morita, Makoto Nagasawa, Tomomi Ota, Yoshihiro Nakamura, Takuji Yokoe, Etsuo Chosa
Journal of Knee Surgery 2021.12
Publishing type：Research paper (scientific journal)
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Turner’s syndrome associated with discoid lateral meniscus and Blount’s disease: a case report Reviewed
Kita T., Tajima T., Chosa E.
BMC Musculoskeletal Disorders 22 ( 1 ) 449 2021.12
Language：English Publishing type：Research paper (scientific journal) Publisher：BMC Musculoskeletal Disorders
Background: Turner’s syndrome, discoid meniscus, and Blount’s disease have all been studied in isolation, but, to the best of our knowledge, there have been no studies reporting a patient with all three. Thus, the first case of Turner’s syndrome with discoid meniscus and Blount’s disease is presented. Case presentation: A 5-year-old Japanese girl with a history of Turner’s syndrome and Blount’s disease complained of pain in her left knee. Magnetic resonance imaging showed a discoid lateral meniscus tear, and arthroscopic partial meniscectomy was performed, providing a good outcome. Conclusions: In this report, some possible explanations regarding the concomitant presence of these three diseases are discussed. A possible explanation in this case is that the patient with Turner’s syndrome had a discoid lateral meniscus that might have been induced by some genetic factors associated with Turner’s syndrome, and then the discoid lateral meniscus might have been the mechanical stress that caused Blount’s disease.
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Yokoe T., Tajima T., Yamaguchi N., Morita Y., Chosa E.
BMC Musculoskeletal Disorders 22 ( 1 ) 636 2021.12
Language：English Publishing type：Research paper (scientific journal) Publisher：BMC Musculoskeletal Disorders
Background: Lateral ankle sprain (LAS) is one of the most common musculoskeletal injuries. Numerous studies regarding LAS have been performed. However, there are few studies evaluating the current clinical practice of orthopaedic surgeons regarding LAS. The purpose of this study was to evaluate the current clinical practice of general orthopaedic surgeons in the treatment of LAS. Methods: A questionnaire survey was conducted from September 2020 to December 2020 in Miyazaki, Japan, to evaluate the clinical practice of general orthopaedic surgeons in the treatment of LAS. The survey was composed of 12 questions that were developed with consideration of the recommendations in the current clinical practice guidelines (CPGs) published by the Dutch orthopaedic society. The questions in this study were focused on the diagnosis, conservative treatment, rehabilitation, and the criteria for return to sports (RTS). Results: The survey response rate was 82.7% (129/156). Among the respondents, 95.3% did not consider the Ottawa Ankle Rules in the decision to perform plain radiography for patients. Rehabilitation following LAS was performed in 58.9% of patients. Eighty-five (65.9%) of the surgeons used only one factor as the criterion for RTS. The absence of pain was the most frequently used criterion (45.7%). No objective criteria were used for the RTS decision in athletes with LAS. Conclusions: The present study suggested that most general orthopaedic surgeons do not provide the care for patients with LAS recommended by the current CPGs. No objective criteria for the RTS decision are used for athletes with LAS.
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A case of nail-patella syndrome with osteochondral lesion of the lateral femoral condyle accompanied with anomalies of anterior horns of the menisci and lateral femoral condyle Reviewed
2021.10
Publishing type：Research paper (scientific journal)
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當瀬 雅大, 大田 智美, 坂本 武郎, 田島 卓也, 山口 奈美, 長澤 誠, 森田 雄大, 横江 琢示, 川越 秀一, 帖佐 悦男, 川野 啓介
整形外科と災害外科 70 ( 4 ) 749 - 753 2021.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：西日本整形・災害外科学会
〔はじめに〕腱鞘巨細胞腫は手指に多く発生することが知られているが，多発例の報告は稀である．上下肢3か所に多発した稀な腱鞘巨細胞腫の症例を経験したので報告する．〔症例〕45歳男性で，約4年前に左示指に釣り針が刺さった同時期より左示指，左肘，左膝の腫瘤を自覚した．MRIで3か所とも関節外にT1強調画像で等から軽度高信号，T2強調画像で低信号，造影で不均一に造影される境界明瞭な腫瘤を認めた．左膝腫瘤の切除生検を施行した結果，腱鞘巨細胞腫の診断に至った．生検と画像所見より，多発腱鞘巨細胞腫と判断し，3か所同時に腫瘍摘出術を施行し，最終診断もすべて腱鞘巨細胞腫であった．〔考察〕我々が渉猟しえた限りでは多発例は32報告で，上下肢に及ぶ2か所発生例，3病変の発生例はそれぞれ1例のみであった．本症例は上下肢に及ぶ3病変の多発例であり，稀な症例であると思われた．〔結語〕本症例は再発リスク因子が多く，今後の慎重な経過観察が必要と考える．
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木戸 義隆, 田島 卓也, 山口 奈美, 長澤 誠, 大田 智美, 森田 雄大, 横江 琢示, 川越 秀一, 帖佐 悦男
整形外科と災害外科 70 ( 4 ) 703 - 706 2021.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：西日本整形・災害外科学会
【目的】高校空手選手の貧血について調査したので報告する．【対象・方法】2012-2019年の宮崎県某高校空手部1年生68名（男子39名，女子29名）を対象とし，2015-2019年の国民体育大会宮崎県代表候補選手のうち高校1年生160名（男子114名，女子46名）と比較した．【結果】男子はHb＜13 g/dL，女子はHb＜12 g/dLを貧血とした．【結果】空手選手では30.8％（男子28.2％，女子34.5％）に貧血を認め，全例正球性貧血だった．他競技の貧血例は陸上女子選手1例だった．空手選手の貧血群と非貧血群で血清鉄，網赤血球，フェリチン，不飽和鉄結合能に有意差はなく，貧血と鉄欠乏に関連はなかった．【考察】空手部の貧血が全例正球性貧血であったことから，空手の突き動作に伴い頻回に足を踏み込む動作で足底血管にて溶血をきたしたと考えた．空手選手のメディカルサポートの際には，貧血を考慮する必要があると考えられた．
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Yokoe T, Tajima T, Yamaguchi N, Ota T, Nagasawa M, Morita Y, Chosa E
Journal of Foot and Ankle Surgery 60 ( 5 ) 1054 - 1059 2021.9
Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Foot and Ankle Surgery
Osteotomy of the distal fibula or anterolateral corner of the tibia is usually required to fix a displaced osteochondral fracture of the talus that is located central to posterior area of the lateral talar dome. However, osteotomy is an invasive procedure and is associated with complications, including nonunion, persistent pain, and hardware-related problems. Lateral inverted osteochondral fracture of the talus (LIFT) lesion is an extremely rare type of displaced osteochondral lesion of the talus. We describe a case in which a LIFT lesion was fixed using an innovative surgical approach, inverting capsulo-lateral fibulotalocalcaneal ligament (LFTCL)–fibular periosteum complex, with a favorable short-term clinical outcome.
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上下肢3ヶ所に多発した腱鞘巨細胞腫の治療経験 Reviewed
當瀬 雅大, 大田 智美, 坂本 武郎, 田島 卓也, 山口 奈美, 長澤 誠, 森田 雄大, 横江 琢示, 川越 秀一, 帖佐 悦男, 川野 啓介
整形外科と災害外科 2021.9
Publishing type：Research paper (scientific journal)
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高校空手選手における貧血調査 Reviewed
木戸 義隆, 田島 卓也, 山口 奈美, 長澤 誠, 大田 智美, 森田 雄大, 横江 琢示, 川越 秀一, 帖佐 悦男
整形外科と災害外科 2021.9
Publishing type：Research paper (scientific journal)
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The current clinical practice of general orthopaedic surgeons in the treatment of lateral ankle sprain: a questionnaire survey in Miyazaki, Japan
Yokoe T, Tajima T, Yamaguchi N, Morita Y, Chosa E
BMC Musculoskeletal Disorders 2021.7
Publishing type：Research paper (scientific journal)
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Symptomatic discoid lateral meniscus shows a relationship between types and tear patterns, and between causes of clinical symptom onset and the age distribution
Yamaguchi N, Chosa E, Tajima T, Morita Y, Yokoe T
Knee Surgery, Sports Traumatology, Arthroscopy 2021.6
Publishing type：Research paper (scientific journal)
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Non-anatomical placement adversely affects the functional performance of the meniscal implant: a finite element study
Shriram D, Yamako G, Kumar G.P, Chosa E, Cui F, Subburaj K
Biomechanics and Modeling in Mechanobiology 2021.6
Publishing type：Research paper (scientific journal)
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Turner’s syndrome associated with discoid lateral meniscus and Blount’s disease: a case report
Kita T, Tajima T, Chosa E
BMC Musculoskelet Disord 2021.5
Publishing type：Research paper (scientific journal)
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Tajima T., Yamaguchi N., Morita Y., Yokoe T., Nagasawa M., Ota T., Kawagoe S., Nakamura Y., Chosa E.
Journal of Knee Surgery 36 ( 10 ) 1095 - 1101 2021.5
Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Knee Surgery
This study was conducted to present remnant-preserving anterior cruciate ligament (ACL) augmentation as a useful option for partial ACL injury in multiligament knee injury (MLKI) cases, which may also contribute to conserving graft resources. The present study involved patients diagnosed with MLKI at our institute from Spring 2006 to February 2021. A total of 71 MLKI cases were provided surgery due to knee instability and disability. For every patient, an arthroscopic diagnostic was performed to ensure that ACL tear and a remnant were present. When the ACL remnant was classified into group 2, 3, or 4 of Nakamae's classification, remnant-preserved single bundle ACL augmentation was performed. Graft selection and the combination of injured ligaments were evaluated. The side-to-side difference under an anterior tibial load of 134 N with an arthrometer and the leg symmetry index at 60 degrees/s were measured. The present procedure was performed for five cases (male/female: 4/1, mean age: 33.6 years). The mean follow-up period was 26.4 months. The combination of torn ligaments was as follows: 3 cases of ACL + medial collateral ligament, one case of ACL + posterior cruciate ligament, and one case of ACL + posterolateral corner. An ACL augmentation graft was performed using an ipsilateral gracilis tendon in 2 cases, a contralateral full semitendinosus tendon in 2 cases, and the ipsilateral distal 1/2 of the semitendinosus tendon in 1 case. The mean side-to-side difference was 1.07 ± 0.4 mm. The mean leg symmetry index was 82.6 ± 12.2% in knee extension and 96.3 ± 9.9% in knee flexion. Although the present study was a small case series, the remnant-preserved single-bundle ACL augmentation for MLKI surgery provided good clinical outcome and conserved the graft resource. Even in the MLKI case, this technique is one of the useful surgical options. The level of evidence of this study is level IV (case series).
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Predictors of Spondylolysis on Magnetic Resonance Imaging in Adolescent Athletes With Low Back Pain
Takuji Yokoe, Takuya Tajima, Hiroshi Sugimura, Shinichirou Kubo, Shotarou Nozaki, Nami Yamaguchi, Yudai Morita, Etsuo Chosa
Orthopaedic Journal of Sports Medicine 2021.4
Publishing type：Research paper (scientific journal)
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Turner’s syndrome associated with discoid lateral meniscus and Blount’s disease: a case report
Kita T, Tajima T, Chosa E
BMC Musculoskeletal Disorders 2021.3
Publishing type：Research paper (scientific journal)
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Effect of total hip arthroplasty on improving locomotive syndrome in hip disease patients: A prospective cohort study focused on total clinical decision limits stage 3 Reviewed
Shigeaki Miyazaki, Kurumi Tsuruta, Saori Yoshinaga, Yoichiro Yamaguchi, Yoshinori Fujii, Hideaki Arakawa, Masaru Ochiai, Tsubasa Kawaguchi, Aya Unoki, Takero Sakamoto, Takuya Tajima, Yoshihiro Nakamura, Taro Funamoto, Masaru Hiyoshi, Etsuo Chosa
Journal of Orthopaedic Science 21 2021.2
Language：English Publishing type：Research paper (scientific journal)
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座談会 ラグビーワールド･カップからみえてきたスポーツ医学の実際と課題
田島 卓也, 守屋 拓朗, 高森 草平, 井澤 秀典, 大野 均, 德永 祥尭, 黒田 良祐
臨床整形外科 56 ( 1 ) 4 - 14 2021.1
Publishing type：Research paper (scientific journal) Publisher：株式会社医学書院
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Predictors of Spondylolysis on Magnetic Resonance Imaging in Adolescent Athletes With Low Back Pain Reviewed
Yokoe T., Tajima T., Sugimura H., Kubo S., Nozaki S., Yamaguchi N., Morita Y., Chosa E.
Orthopaedic Journal of Sports Medicine 9 ( 4 ) 2325967121995466 2021.1
Language：English Publishing type：Research paper (scientific journal) Publisher：Orthopaedic Journal of Sports Medicine
Background: Spondylolysis and undiagnosed mechanical low back pain (UMLBP) are the main causes of low back pain (LBP) in adolescent athletes. No studies have evaluated the difference in clinical and radiographic factors between these 2 conditions. Furthermore, it remains unclear which adolescent athletes with LBP should undergo advanced imaging examination for spondylolysis. Purpose: To compare the clinical and radiographic factors of adolescent athletes with spondylolysis and UMLBP who did not have neurological symptoms or findings before magnetic resonance imaging (MRI) evaluation and to determine the predictors of spondylolysis findings on MRI. Study Design: Cohort study, Level of evidence, 3. Methods: The study population included 122 adolescent athletes aged 11 to 18 years who had LBP without neurological symptoms or findings and who underwent MRI. Of these participants, 75 were ultimately diagnosed with spondylolysis, and 47 were diagnosed with UMLBP. Clinical factors and the following radiographic parameters were compared between the 2 groups: spina bifida occulta, lumbar lordosis (LL) angle, and the ratio of the interfacet distance of L1 to that of L5 (L1:L5 ratio, %). A logistic regression analysis was performed to evaluate independent predictors of spondylolysis on MRI scans. Results: Significantly more athletes with spondylolysis were male (82.7% vs 48.9%; P <.001), had a greater LL angle (22.8° ± 8.1° vs 19.3° ± 8.5°; P =.02), and had a higher L1:L5 ratio (67.4% ± 6.3% vs 63.4% ± 6.6%; P =.001) versus athletes with UMLBP. A multivariate analysis revealed that male sex (odds ratio [OR], 4.66; P <.001) and an L1:L5 ratio of >65% (OR, 3.48; P =.003) were independent predictors of positive findings of spondylolysis on MRI scans. Conclusion: The study findings indicated that sex and the L1:L5 ratio are important indicators for whether to perform MRI as an advanced imaging examination for adolescent athletes with LBP who have no neurological symptoms and findings.
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Yamaguchi N., Chosa E., Tajima T., Morita Y., Yokoe T.
Knee Surgery, Sports Traumatology, Arthroscopy 30 ( 4 ) 1436 - 1442 2021.1
Language：English Publishing type：Research paper (scientific journal) Publisher：Knee Surgery, Sports Traumatology, Arthroscopy
Purpose: Discoid meniscus is a congenital abnormality of the lateral meniscus and is seen more frequently in East Asia. The purpose of this study was to retrospectively assess the relationship between discoid lateral meniscus (DLM) types and tear patterns and causes of age-specific clinical symptom onset. Methods: Of 1650 arthroscopic surgeries over a 20-year period, 138 (105 patients) were performed for DLM and were evaluated in this study. The mean age at surgery was 21.5 ± 15.8 years. The DLM type was classified by Watanabe’s classification, and tear patterns were classified by the modified Bin’s classification as simple horizontal, complicated horizontal, longitudinal, radial, complex, and no tear. Additionally, patients were divided by age group (< 10, 10–19, 20–39, 40–59, and ≥ 60 years) and classified according to the causes of clinical symptom onset as follows: sports activities, minor trauma in daily living, and no traumatic episode. Results: The DLM was complete in 78 (56.5%) knees and incomplete in 60 (43.5%); no Wrisberg type DLM was observed. Simple horizontal and complicated horizontal tears were significantly more frequent in complete DLM, whereas radial tears and no tears were significantly more frequent in incomplete DLM (p < 0.0001). When classified by age group, 74 (53.6%) knees with DLMs were found in teenagers. Sports activities caused symptom onset significantly more often in teenagers, no traumatic episode caused symptom onset in patients aged < 10 years, and minor trauma in daily living caused symptom onset in patients aged 40–59 years and ≥ 60 years (p < 0.0001). No relationship was found between the age distribution and tear patterns; however, the absence of tears tended to be more common in teenaged patients, and complicated horizontal tears were more common in patients over 20 years of age. Conclusion: Symptomatic DLM occurred most often in teenagers. A relationship was identified between the DLM types and tear patterns, which could be helpful in preoperative planning. Causes of clinical symptom onset in patients with DLM were characterised by age group, which might help clinicians to suspect the presence of DLM. Level of evidence: Level IV.
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Significance of Physical Activities and Sports for Children
2021
Publishing type：Research paper (scientific journal)
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Yokoe T., Tajima T., Yamaguchi N., Morita Y., Chosa E.
Journal of Orthopaedic Science 2021
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Orthopaedic Science
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Biomechanical evaluation of artificial hip joint stem with Young's modulus gradation
2021
Publishing type：Research paper (scientific journal)
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Yokoe T., Tajima T., Kawagoe S., Yamaguchi N., Morita Y., Chosa E.
Orthopaedic Journal of Sports Medicine 9 ( 11 ) 23259671211056305 2021
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Orthopaedic Journal of Sports Medicine
Background: Stress ultrasonography (US) has been shown to be a valid procedure for evaluating chronic anterior talofibular ligament (ATFL) injury. The ratio of stress/nonstress ATFL length (ATFL ratio) as measured on US is clinically useful; however, there are no published normative data concerning this ratio. Purpose: To report a normative value of the ATFL ratio on US and evaluate the relationships between sex, generalized joint laxity (GJL), and the grade of anterior drawer test (ADT). Study Design: Cross-sectional study; Level of evidence, 3. Methods: The ATFL lengths were prospectively measured in the stress and nonstress positions (manual maximal anterior drawer position) for participants with noninjured ankles from March 2020 to March 2021. GJL was defined as a Beighton score ≥4. A manual ADT was also performed. The ATFL ratio was calculated, and the relationships between sex, GJL, and ADT grade were evaluated. Results: A total of 333 ankles in 184 participants (mean age, 24.5 ± 2.7 years; range, 20-33 years) were eligible for the analysis. GJL was found in 69 ankles (20.7%). The mean ATFL ratio was 1.08 ± 0.04 (95% CI, 1.08-1.09; range, 1.01-1.24), and there was a significant difference between male (1.07 ± 0.04; 95% CI, 1.07-1.08; range, 1.02-1.23) and female (1.09 ± 0.04; 95% CI, 1.08-1.10; range, 1.01-1.24) ankles (P =.001). In male ankles, the ATFL ratio was significantly greater in participants with GJL (1.11 ± 0.06 vs 1.07 ± 0.03; P =.02) or a higher grade of ADT (grade 2 vs grade 1: 1.11 ± 0.06 vs 1.07 ± 0.03, P =.002). These findings were not observed in female ankles. Conclusion: The normative value of the ATFL ratio on stress US was 1.07 ± 0.04 in men and 1.09 ± 0.04 in women. The ATFL ratio was affected by the presence of GJL in men but not in women. These findings will be useful for future studies seeking to establish the cutoff value of the ATFL ratio for diagnosing chronic lateral ankle stability on stress US.
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Efficacy of Diagnosing Carpal Tunnel Syndrome Using the Median Nerve Stenosis Rate Measured on Ultrasonographic Sagittal Imagery: Clinical Case-Control Study
Okura T., Sekimoto T., Matsuoka T., Fukuda H., Hamada H., Tajima T., Chosa E.
Hand 2021
Publishing type：Research paper (scientific journal)
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特集 アキレス腱断裂診療のコツと最近のトピックス アキレス腱断裂の診断
田島 卓也, 帖佐 悦男
整形･災害外科 63 ( 12 ) 1627 - 1635 2020.11
Publishing type：Research paper (scientific journal) Publisher：金原出版
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Tajima Takuya, Yamaguchi Nami, Kuroki Syuji, Morita Yudai, Chosa Etsuo
DESCENTE SPORTS SCIENCE 41 ( 0 ) 135 - 144 2020.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION OF SPORTS SCIENCE
Severe head and neck injuries occasionally occur in collision sports such as Judo or Rugby football. Degenerative changes in the cervical spine including abnormal alignment, spur formation and disc space narrowing are risk factors for severe injuries. It is also well known that neck muscle strength is one of the important factors for the prevention of severe injuries and degenerative disorders. The aim of this study future was to assess the relationship between the neck muscle strength and radiographic findings of the cervical spine among collision sports players. We hypothesized that poor muscle strength and unbalanced neck muscle flexion/extension strength ratio maybe associated with degenerative cervical findings. 168 judo-players （22-32 years old） and 203 rugby football-players （18-30） underwent neck extension and flexion muscle strength measurement, and 55 judo-players and 58 rugby players underwent cervical radiographical examination. Cervical alignment was classified as normal, straight, kyphosis, and sigmoid according to the Borden & Rechitman method. Disc space narrowing and spur formation were also measured according to the Kondo method and the Nathan classification. Height, weight, neck flexion and extension strength, flexion/extension ratio of the judo group ware higher than that of the rugby group with stastical significance. However, there were no significant difference of result/weight value （Judo: flexion;2.39N, extension;3.38N. ratio;0.71, Rugby: flexion;2.37, extension; 3.41, ratio; 0.70）．In Judo group, sigmoid deformity group （420±50.2N） showed significantly higher neck extension strength compared with normal group （331.7±48.4N, p<0.05）．At the factor of flexion/extension muscle strength ratio, straight （0.67） and kyphosis （0.63） group showed significantly lower value compared with normal group （0.78. p<0.05） in Judo. In Rugby group, the presence of spur formation group （0.54） showed lesser flexion/extension muscle strength ratio compared with normal group （0.68）， significantly （p<0.05）．Neck muscle strength is one important factor to prevent and reduce the severe neck injury or cervical spine abnormal findings. From this study, not only the value of muscle strength, but also the flexion/extension ratio provide important contribution for these findings. Lower flexion/extension neck muscle strength ratio is one of the risk factors of cervical spine issues for collision sports players.
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山口 洋一朗, 李 徳哲, 永井 琢哉, 舩元 太郎, 田島 卓也, 帖佐 悦男
Journal of Medical Internet Research 22 ( 8 ) e18684 2020.8
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：JMIR Publications
ackground:
Most people currently use the internet to obtain information about many subjects, including health information. Thus, medical associations need to provide accurate medical information websites. Although medical associations have their own patient education pages, it is not clear if these websites actually show up in search results.
Objective:
The aim of this study was to evaluate how well medical associations function as online information providers by searching for information about musculoskeletal-related pain online and determining the ranking of the websites of medical associations.
Methods:
We conducted a Google search for frequently searched keywords. Keywords were extracted using Google Ads Keyword Planner associated with “pain” relevant to the musculoskeletal system from June 2016 to December 2019. The top 20 search queries were extracted and searched using the Google search engine in Japan and the United States.
Results:
The number of suggested queries for “pain” provided by Google Ads Keyword Planner was 930 in the United States and 2400 in Japan. Among the top 20 musculoskeletal-related pain queries chosen, the probability that the medical associations’ websites would appear in the top 10 results was 30% in the United States and 45% in Japan. In five queries each, the associations’ websites did not appear among the top 100 results. No significant difference was found in the rank of the associations’ website search results (P=.28).
Conclusions:
To provide accurate medical information to patients, it is essential to undertake effective measures for search engine optimization. For orthopedic associations, it is necessary that their websites should appear among the top search results. -
Clinical and Radiographic Outcomes of Double-Bundle Anterior Cruciate Ligament Reconstruction for Asian Patients with Bone-Patellar Tendon-Bone and Gracilis Tendon Grafts: A Matched-Control Comparison Reviewed
Takuya Tajima、Nami Yamaguchi、Yudai Morita、Makoto Nagasawa、Tomomi Ota、Yoshihiro Nakamura、Takuji Yokoe、Etsuo Chosa
The Journal of Knee Surgery 1 - 8 2020.5
Language：English Publishing type：Research paper (scientific journal)
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The Mission of National Team Doctor for Providing Best Performance of Players Invited Reviewed
Tajima Takuya, Nakamura Akihiko, Chosa Etsuo
Japanese Journal of Orthopaedic Sports Medicine 40 ( 3 ) 229 - 235 2020
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Orthopaedic Socety for Sports Medicine
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上腕骨小頭離断性骨軟骨炎手術例と野球検診の関係 Reviewed
岩佐一真、長澤誠、田島卓也、山口奈美、大田智美、森田雄大、帖佐悦男
九州・山口スポーツ医・科学研究会誌 31 35 - 37 2019.7
Language：Japanese Publishing type：Research paper (scientific journal)
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サッカー日本女子代表（なでしこジャパン）のメディカルサポートを通して Invited Reviewed
山口奈美、田島卓也、長澤誠、森田雄大、帖佐悦男、園田典生
日本整形外科スポーツ医学会雑誌 39 ( 2 ) 10 - 14 2019.5
Language：Japanese Publishing type：Research paper (scientific journal)
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全国レベルの高校空手道部の新入生メディカルチェック：3年間の結果より Reviewed
北堀貴史、森田雄大、長澤誠、黒木修司、山口奈美、田島卓也、石田康行、帖佐悦男
日本臨床スポーツ医学会誌 27 ( 2 ) 266 - 272 2019.4
Language：Japanese Publishing type：Research paper (scientific journal)
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ヘモグロビンは滑膜からADAMTS-5，-9の発現を亢進させる：関節血症の軟骨変性に及ぼす影響 Reviewed
田島卓也、谷口昇、山口奈美、帖佐悦男
日本関節鏡・膝・スポーツ整形外科学会雑誌 44 ( 1 ) 292 - 293 2019.3
Language：Japanese Publishing type：Research paper (scientific journal)
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ACL損傷後・再建術後のスポーツ復帰：〜100%を超える復帰〜現場におけるACL損傷膝・再建膝の復帰プログラム Reviewed
田島卓也、中川匠
日本整形外科スポーツ医学会雑誌 39 ( 1 ) 2019
Language：Japanese Publishing type：Research paper (scientific journal)
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アスリートが本番で実力を発揮するための方策 ラグビー帯同ドクターの立場から Reviewed
井上貴司、坂根正孝、守屋拓朗、田島卓也、中村明彦
関節外科 37 ( 10 ) 1115 - 1119 2018.10
Language：Japanese Publishing type：Research paper (scientific journal)
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成長期・育成世代のラグビー選手に対する外傷・脳振盪後の復帰プロトコル Reviewed
田島 卓也，帖佐 悦男
Monthly Book MEDICAL REHABILITATION ( 228 ) 108 - 115 2018.10
Language：Japanese Publishing type：Research paper (scientific journal)
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Double crushを呈していた橈尺骨骨幹部骨折後尺骨神経障害の1例 Reviewed
藤田貢司、石田康行、谷口昇、田島卓也、山口奈美、長澤誠、森田雄大、関本朝久、帖佐悦男
整形外科と災害外科 67 ( 4 ) 674 - 676 2018.9
Language：Japanese Publishing type：Research paper (scientific journal)
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脳震盪・頚部外傷発生時の現場対応、リハビリテーションと競技復帰 Reviewed
坂根正孝、村上秀孝、田中誠人、田島卓也、山田睦雄
日本臨床スポーツ医学会誌 26 ( 3 ) 344 - 347 2018.8
Language：Japanese Publishing type：Research paper (scientific journal)
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サッカー日本女子代表：メディカルサポートの実際と課題 Reviewed
山口奈美、石田康行、田島卓也、森田雄大、帖佐悦男、園田典生
日本整形外科スポーツ医学会雑誌 38 ( 3 ) 5 - 9 2018.7
Language：Japanese Publishing type：Research paper (scientific journal)
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遠隔医療システムを用いたラグビー新サポートシステムの可能性～ITシステムが新たな安全対策のソリューションになり得るか～ Reviewed
中村嘉宏、帖佐悦男、田島卓也、吉川大輔、黒木修司、比嘉聖
日本整形外科スポーツ医学会雑誌 38 ( 3 ) 44 - 50 2018.7
Language：Japanese Publishing type：Research paper (scientific journal)
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宮崎県少年野球検診−検診結果と可動域の関係− Reviewed
長澤誠、石田康行、谷口昇、田島卓也、山口奈美、三橋龍馬、川野啓介、帖佐悦男
日本関節鏡・膝・スポーツ整形外科學會雑誌 43 ( 2 ) 562 - 563 2018.4
Language：Japanese Publishing type：Research paper (scientific journal)
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Larson変法を用いた膝後外側支持機構再建術 Reviewed
山口奈美、田島卓也、石田康行、谷口昇、大田智美、長澤誠、帖佐悦男
日本関節鏡・膝・スポーツ整形外科學會雑誌 43 ( 2 ) 506 - 507 2018.4
Language：Japanese Publishing type：Research paper (scientific journal)
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2019年ワールドカップ、2020年オリンピックに向けたラグビーチームのメディカルサポート Reviewed
板根正孝、守屋拓朗、井上貴司、井澤秀典、田島卓也、中村明彦
Bone Joint Nerve 8 ( 2 ) 239 - 243 2018.4
Language：Japanese Publishing type：Research paper (scientific journal)
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外側広範型上腕骨小頭離断性骨軟骨炎の手術成績を左右する因子 Reviewed
石田康行、長澤誠、谷口昇、田島卓也、山口奈美、大田智美、帖佐悦男
日本関節鏡・膝・スポーツ整形外科學會雑誌 43 ( 1 ) 16 - 17 2018.3
Language：Japanese Publishing type：Research paper (scientific journal)
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脛骨付着部を温存した自家半健様筋健グラフトによるＭＣＬ再建術の術後短期成績 Reviewed
田島卓也、山口奈美、谷口昇、石田康行、大田智美、長澤誠、帖佐悦男
日本関節鏡・膝・スポーツ整形外科學會雑誌 43 ( 1 ) 180 - 181 2018.3
Language：Japanese Publishing type：Research paper (scientific journal)
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ＩＰ関節の色素沈着を伴い発症した関節リウマチ症例
濱田浩朗、古結英樹、関本朝久、田島卓也、天野正宏、帖佐悦男
宮崎県医師会医学会誌 42 ( 1 ) 97 - 104 2018.3
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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当院における Fibrin Clot を用いた関節鏡視下半月縫合術の治療経験（共著） Reviewed
戸田雅, 田島卓也, 山口奈美, 帖佐悦男
整形外科と災害外科 66 ( 2 ) 254 - 257 2017.3
Language：Japanese Publishing type：Research paper (scientific journal)
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スポーツ活動者の外傷性肩関節前方不安定症に対する鏡視下バンカート修復術の成績（共著） Reviewed
横江琢示, 石田康行, 田島卓也, 帖佐悦男
日本整形外科スポーツ医学会雑誌 37 ( 1 ) 59 - 63 2017.3
Language：Japanese Publishing type：Research paper (scientific journal)
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自家ハムストリングス腱を用いた二重束膝前十字靭帯再建術後の３種類の膝固定期間と骨孔拡大の関係 Reviewed
田島卓也
整形外科 68 ( 2 ) 184 - 186 2017.2
Language：Japanese Publishing type：Research paper (scientific journal)
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ラグビーワールドカップ2019におけるメディカルネットワーク構築（共著） Reviewed
田島卓也, 中村明彦, 帖佐悦男
臨床スポーツ医学 34 ( 2 ) 106 - 110 2017.2
Language：Japanese Publishing type：Research paper (scientific journal)
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膝関節外側滑膜ヒダ障害による弾発膝を来した1例 Reviewed
三股奈津子, 石田康行, 谷口昇, 田島卓也, 山口奈美, 大田智美, 帖佐悦男
九州・山口スポーツ医・科学研究会誌 28 78 - 80 2016.7
Language：Japanese Publishing type：Research paper (scientific journal)
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BTBと薄筋腱を併用した2重束ACL再建術の臨床成績と画像評価
田島卓也、石田康行、谷口昇、山口奈美、帖佐悦男
JOSKAS 41 ( 1 ) 116 - 117 2016.3
Language：Japanese Publishing type：Research paper (scientific journal)
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Remnant-preservint, selective single-bundle augmentation of the anterior cruciate ligament using a bone-patellar tendon-bone autograft: a technical note(共著) Reviewed
Takuya Tajima, Etsuo Chosa, Nami Yamaguchi, Noboru Taniguchi, Yasuyuki Ishida
The Knee 2016.2
Language：English Publishing type：Research paper (scientific journal)
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横江 琢示, 田島 卓也, 中村 嘉宏, 山口 奈美, 黒木 修司, 帖佐 悦男
整形外科と災害外科 65 ( 1 ) 54 - 57 2016
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：西日本整形・災害外科学会
宮崎大学医学部整形外科は宮崎県と連携し，積極的にスポーツイベントへのメディカルサポートを行なっている．平成25年度に当科が行ったメディカルサポート状況につき調査した．宮崎大学医学部整形外科所属の医師が出務した宮崎県外・海外へのチーム帯同や医事運営は10件でその期間は3日間から32日間であった．内訳としては，U-17女子サッカー日本代表帯同が3件，国民体育大会（国体）宮崎県選手団帯同が3件，国体サッカー少年の部帯同が3件，全国高校ラグビー大会帯同が1件であった．宮崎県内で開催されたスポーツイベントのマッチドクター，医事運営への出務は46競技会62日間であった．内訳としては，ラグビー32日，サッカー11日，柔道8日，マラソン2日でその他競技が9日であった．出務医師総数は15人で8人はスポーツドクター資格保持者であった．当科でのスポーツイベントへの医師派遣の現状および課題について報告する．
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宮崎県における2014春季キャンプに対するメディカルサポート報告－キャンプの地の総合的メディカルサポート体制の構築にむけて－(共著) Reviewed
小島岳史, 田島卓也, 帖佐悦男, 石田康行, 河原勝博, 山口奈美, 日吉優, 永井琢哉, 園田典生, 松岡知己, 井上篤, 田島直也, 山本惠太郎, 樋口潤一
九州・山口スポーツ医・科学研究会誌 ( 27 ) 4 - 7 2015.7
Language：Japanese Publishing type：Research paper (scientific journal)
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Morphologic changes of anchor holes by using full-thread anchors after the suture bridge technique"jointly worked" Reviewed
Journal of Japanese Orthopaedic Society of Knee,Arthroscopy and Sports Medicine 40 ( 3 ) 587 - 590 2015.6
Language：Japanese Publishing type：Research paper (scientific journal)
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Prospective Comparisons of Femoral Tunnel Enlargement With 3 Different Postoperative Immobilization Periods After Double-Bundle Anterior Cruciate Ligament Reconstruction With Hamstring Grafts(共著) Reviewed
Takuya Tajima, Etsuo Chosa, Katsuhiro Kawahara, Nami Yamaguchi.
Arthroscopy 31 ( 4 ) 651 - 658 2015.4
Language：English Publishing type：Research paper (scientific journal)
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自家ハムストリング腱を用いたbi-socket法によるPCL再建術の術後短期成績 Reviewed
田島卓也, 河原勝博, 山口奈美, 石田康行, 谷口昇, 帖佐悦男
日本関節鏡・膝・スポーツ整形外科学会雑誌（JOSKAS） 40 ( 1 ) 176 - 177 2015.3
Language：Japanese Publishing type：Research paper (scientific journal)
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Comprehensive Safety Manegement and Assessment at Rugby Football Competitions. Invited Reviewed
Tajima T, Chosa E, Kawahara K, Nakamura Y, Yoshikawa D, Yamaguchi N, Kashiwagi T.
International Journal of sports medicine 35 1012 - 1016 2014.12
Language：English Publishing type：Research paper (scientific journal)
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ランニング障害とその対策：股関節 Invited Reviewed
田島卓也, 帖佐悦男
臨床スポーツ医学 31 ( 9 ) 884 - 889 2014.9
Language：Japanese Publishing type：Research paper (scientific journal)
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春シーズンに開催されたラグビー競技会で発生した熱中症の2例 Reviewed
山口洋一朗, 山口奈美, 田島卓也, 帖佐悦男
九州・山口スポーツ医・科学研究会誌 26 100 - 102 2014.7
Language：Japanese Publishing type：Research paper (scientific journal)
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Os acromialeを伴った腱板断裂に対する鏡視下腱板修復，Os acromiale切除術 Reviewed
石田康行, 帖佐悦男, 谷口昇, 田島卓也, 山口奈美, 大田智美, 中村志保子
JOSKAS 39 ( 3 ) 564 - 568 2014.6
Language：Japanese Publishing type：Research paper (scientific journal)
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Comprehensive Safety Manegement and Assessment at Rugby Football Competitions. Reviewed
Tajima T, Chosa E, Kawahara K, Nakamura Y, Yoshikawa D, Yamaguchi N, Kashiwagi T.
International Journal of sports medicine 2014.5
Language：English Publishing type：Research paper (scientific journal)
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子どもからのロコモ予防の重要性－運動器検診を通して－ Invited Reviewed
山口奈美, 山本惠太郎, 河原勝博, 石田康行, 田島卓也, 帖佐悦男
日本臨床スポーツ医学会誌 22 ( 2 ) 250 - 253 2014.4
Language：Japanese Publishing type：Research paper (scientific journal)
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Prevention of the Cervical Degenerative Changes in Rugby Football Players:The Effect of Core Muscle Strength Exercise Reviewed
Japanese Journal of ORTHOPAEDIC SPORTS MEDICINE 34 ( 1 ) 80 - 84 2014.3
Language：Japanese Publishing type：Research paper (scientific journal)
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前十字靭帯不全膝における半月縫合術の成績 Reviewed
森田雄大, 河原勝博, 田島卓也, 山口奈美, 矢野浩明, 石田康行, 村上恵美, 大田智美, 中村志保子, 大塚記史, 帖佐悦男
整形外科と災害外科 63 ( 2 ) 260 - 262 2014.3
Language：Japanese Publishing type：Research paper (scientific journal)
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ハムストリング腱を用いた2重束ACL再建術後の膝固定期間の相違と骨孔拡大の関係 Reviewed
田島卓也, 石田康行, 山口奈美, 帖佐悦男, 山本惠太郎
JOSKAS 日本関節鏡・膝・スポーツ整形外科学会雑誌 39 170 - 171 2014.3
Language：Japanese Publishing type：Research paper (scientific journal)
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森田 雄大, 河原 勝博, 田島 卓也, 山口 奈美, 矢野 浩明, 石田 康行, 村上 恵美, 大田 智美, 中村 志保子, 大塚 記史, 帖佐 悦男
整形外科と災害外科 63 ( 2 ) 260 - 262 2014
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：西日本整形・災害外科学会
【はじめに】われわれは，膝前十字靱帯（以下，ACL）損傷と半月損傷を合併した症例で，諸事情により半月縫合術を単独で施行した症例について，ACL再建術時に半月の状態を評価検討した．【対象・方法】対象は2006年1月から2012年12月の期間に，ACL損傷に半月損傷を合併した症例のうち半月縫合のみ施行した症例6例6膝である．これらについて半月損傷形態，縫合方法，再鏡視所見，待機期間との関連について検討した．【結果】6膝中2膝に再断裂を認め，いずれも待機期間の長い症例であった．【考察】ACL不全膝で半月縫合術を施行した症例は，半月単独損傷で半月縫合術を施行した症例と比較し再断裂は高率であった．待機期間の長い症例で再断裂の可能性が高くなることが示唆された．ACL不全膝に対する半月縫合術は半月単独損傷に比べ再断裂の危険性は高いが，癒合率は66.7％であり禁忌でないと思われた．
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ラグビー選手における頚椎退行変性の予防－頚部体幹コアトレーニング導入の効果－ Reviewed
田島卓也, 帖佐悦男, 河原勝博, 山口奈美, 中村嘉宏
日本整形外科スポーツ医学会雑誌 34 80 - 84 2013.8
Language：Japanese Publishing type：Research paper (scientific journal)
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Distal Biceps Tendon Reconstruction for Rugby Football Player Using Autologous Hamstring Graft and EndoButton Technique:A Case Report Reviewed
33 ( 3 ) 321 - 326 2013.7
Language：Japanese Publishing type：Research paper (scientific journal)
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Three cases tibialplateau franctures and nonunion of tibial shaft fracture treated with TKA Reviewed
38 ( 2 ) 244 - 245 2013.4
Language：Japanese Publishing type：Research paper (scientific journal)
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BTBと薄筋腱を併用した2重束ACL再建術 Reviewed
田島卓也, 山本惠太郎, 河原勝博, 石田康行, 山口奈美, 大田智美, 帖佐悦男
JOSKAS 日本関節鏡・膝・スポーツ整形外科学会雑誌 38 54 - 55 2013.4
Language：Japanese Publishing type：Research paper (scientific journal)
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Three cases tibialplateau fractures and nonunion of tibial shaft fracture treated with TKA
KOJIMA Takeshi
38 ( 2 ) 244 - 245 2013.4
Language：Japanese Publishing type：Research paper (scientific journal)
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鏡視下腱板修復術後における非吸収性アンカー孔の検討 Reviewed
石田康行、帖佐悦男、山本惠太郎、田島卓也、山口奈美、大田智美
Journal of Japanese Orthopaedic Society of Knee, Arthroscopy and Sports Medicine 38 ( 1 ) 16 - 17 2013.3
Language：Japanese Publishing type：Research paper (scientific journal)
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膝外側円板状半月に合併した大腿骨内顆離断性骨軟骨炎の治療経験 Reviewed
山口奈美、山本惠太郎、石田康行、河原勝博、田島卓也、大田智美、帖佐悦男
Journal of Japanese Orthopaedic Society of Knee, Arthroscopy and Sports Medicine 38 ( 1 ) 150 - 151 2013.3
Language：Japanese Publishing type：Research paper (scientific journal)
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ＢＴＢと薄筋腱を併用した２重束ＡＣＬ再建術 Reviewed
田島卓也、山本惠太郎、河原勝博、石田康行、山口奈美、大田智美、帖佐悦男
Journal of Japanese Orthopaedic Society of Knee, Arthroscopy and Sports Medicine 38 ( 1 ) 54 - 55 2013.3
Language：Japanese Publishing type：Research paper (scientific journal)
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Double bundle ACL reconstruction using BTB and Gracilis tendon composite grafts
TAJIMA Takuya
38 ( 1 ) 54 - 55 2013.3
Language：Japanese Publishing type：Research paper (scientific journal)
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YAMAGUCHI Nami
38 ( 1 ) 150 - 151 2013.3
Language：Japanese Publishing type：Research paper (scientific journal)
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The nonabsorbable anchor hole after arthroscopic rotator cuff repair
ISHIDA Yasuyuki
38 ( 1 ) 16 - 17 2013.3
Language：Japanese Publishing type：Research paper (scientific journal)
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Anterior cruciate ligament reconstruction in a patient with Athetoid cerebral palsy: a case report
Tajima T., Chosa E., Yamamoto K., Kawahara K., Yamaguchi N., Watanabe S.
Sports Medicine, Arthroscopy, Rehabilitation, Therapy and Technology 4 ( 1 ) 36 2012.10
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Sports Medicine, Arthroscopy, Rehabilitation, Therapy and Technology
Recent years have seen ACL reconstruction performed in a broad range of patients, regardless of age, sex or occupation, thanks to great advances in surgical techniques, instrumentation and the basic research. Favorable results have been reported; however, we have not been able to locate any reports describing ACL reconstruction in patients with athetoid cerebral palsy.We present herein a previously unreported anterior cruciate ligament (ACL) reconstruction performed in a patient with athetoid cerebral palsy. The patient was a 25-year-old woman with level II athetoid cerebral palsy according to the Gross Motor Function Classification System. She initially injured her right knee after falling off a bicycle. Two years later, she again experienced right-knee pain and a feeling of instability. A right-knee ACL tear and avulsion fracture was diagnosed upon physical examination and confirmed with magnetic resonance imaging (MRI) and X-ray examination at that time. An ACL reconstruction using an autologous hamstring double-bundle graft was performed for recurrent instability nine years after the initial injury. Cast immobilization was provided for 3 weeks following surgery and knee extension was restricted for 3 months with the functional ACL brace to prevent hyperextension due to involuntary movement. Partial weight-bearing was started 1 week postoperatively, with full weight-bearing after 4 weeks. The anterior drawer stress radiography showed a 63% anterior displacement of the involved tibia on the femur six months following the surgery, while the contralateral knee demonstrated a 60% anterior displacement of the tibia. The functional ACL functional brace was then removed. A second-look arthroscopy was performed 13 months after the ACL reconstruction, and both the anteromedial and posterolateral bundles were in excellent position as per Kondo's criteria. The Lachman and pivot shift test performed under anesthesia were also negative. An anterior drawer stress radiography of the involved knee at 36 months following surgery showed a 61% anterior translation of the tibia. The preoperative symptoms of instability resolved and the patient expressed a high degree of satisfaction with the result of her surgery. © 2012 Tajima et al.; licensee BioMed Central Ltd.
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Clinical Outcome of Arthroscopic Rotator Cuff Repair after Using Strict Operative Indication
ISHIDA Yasuyuki, YANO Hiroaki, YAMAMOTO Keitaro, KAWAHARA Katsuhiro, TAJIMA Takuya, YAMAGUCHI Nami, OOTA Tomomi, NAKAMURA Shihoko, CHOSA Etsuo
Orthopedics & Traumatology 61 ( 3 ) 346 - 349 2012.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：West-Japanese Society of Orthopedics & Traumatology
We report the good clinical outcomes of arthroscopic rotator cuff repair (ARCR). However, as the re-tear rate of massive and large tears in advanced muscle atrophy was high, we performed ARCR on such cases under strict operative indication. The purpose of this study is to review the clinical outcome of ARCR after applying strict operative indication. We investigated two periods. The former period was from October 2005 to July 2009 during which 80 shoulders underwent ARCR. The latter period was from August 2009 to August 2010 during which 58 shoulders underwent ARCR. We compared the size and muscle atrophy of the tear, postoperative cuff integrity, and clinical outcome for each period. For the latter period, the rate of massive and large tears and advanced muscle atrophy was lower and the postoperative cuff integrity was more improved than the former period. When we used strict operative indication, the re-tear rate of ARCR was found to decrease. Our results suggest that it is important to select an optimal treatment plan including conservative treatments for individual cases.
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手術適応厳選前後の鏡視下腱板修復術の成績 Reviewed
石田康行、矢野浩明、山本惠太郎、河原勝博、田島卓也、山口奈美、大田智美、中村志保子、帖佐悦男
整形外科と災害外科 別冊 61 ( 3 ) 346 - 349 2012.9
Language：Japanese Publishing type：Research paper (scientific journal)
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Ｍenisｃo Capsular Separationに対する鏡視下半月縫合術の検討 Reviewed
小島岳史、花堂祥治、矢野良英、柏木輝行、塩﨑猛、田島卓也、帖佐悦男
九州・山口 スポーツ医・科学研究会誌 24 89 - 92 2012.8
Language：Japanese Publishing type：Research paper (scientific journal)
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Effect of genu recurvatum on the anterior cruciate ligament-deficient knee during gait
Kawahara K., Sekimoto T., Watanabe S., Yamamoto K., Tajima T., Yamaguchi N., Chosa E.
Knee Surgery, Sports Traumatology, Arthroscopy 20 ( 8 ) 1479 - 1487 2012.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Knee Surgery, Sports Traumatology, Arthroscopy
Purpose: This study aimed to investigate the effects of genu recurvatum, which is considered to carry a high risk for anterior cruciate ligament (ACL) injury, on healthy and post-ACL injury gait and lower extremity muscle strength. Methods: Subjects were 36 patients with ACL-deficient knee and 40 healthy controls without pain or restricted range of motion of the lower extremity during gait. The knee joints of all subjects were examined; those with over 10° hyperextension of both knees were defined as exhibiting genu recurvatum. On this basis, the subjects were further subdivided into two groups: with or without genu recurvatum. A three-dimensional motion analysis system and force plates were used for gait analysis. Isokinetic dynamometers were used to measure knee muscle strength. Results: There were no differences in joint angles, joint moments, or components of ground reaction force during gait or in knee strength for the healthy control subjects with and without genu recurvatum. ACL-deficient subjects without genu recurvatum showed a decrease in knee angles during the stance phase and a decrease in extension moments during the early stance phase compared with ACL-deficient subjects with genu recurvatum and controls. In contrast, neither knee angles nor extension moments during the stance phase differed significantly between ACL-deficient subjects with genu recurvatum and controls. Conclusions: This study provides clinically relevant information regarding the effects of genu recurvatum on gait parameters. The results suggest that in ACL injuries, the presence of genu recurvatum alters gait pattern. Consideration of the presence of genu recurvatum would be useful during rehabilitation following ACL injuries or ACL reconstruction. Level of evidence: II. Prospective comparative study. © 2011 Springer-Verlag.
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Anchor hole enlargement after arthroscopic rotator cuff repair using bioabsorbable suture anchors
ISHIDA Yasuyuki, YAMAMOTO Keitaro, TAJIMA Takuya, YAMAGUCHI Nami, OOTA Tomomi, CHOSA Etsuo
JOSKAS 37 ( 3 ) 391 - 394 2012.6
Language：Japanese Publishing type：Research paper (scientific journal)
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Menisco Capsular Separation に対する鏡視下半月縫合術の検討 Reviewed
小島岳史、花堂祥冶、矢野良英、柏木輝行、田島卓也、帖佐悦男
宮崎整形外科懇話会論文集 ( 16 ) 43 - 44 2012.6
Language：Japanese Publishing type：Research paper (scientific journal)
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ラグビ―競技会における医療体制向上と重症事故発生予防を目的とした安全度評価法の活用 Reviewed
田島卓也、帖佐悦男、山本惠太郎、中村嘉宏、山口奈美、柏木輝行
日本整形外科スポーツ医学会雑誌 32 ( 2 ) 35 - 40 2012.5
Language：Japanese Publishing type：Research paper (scientific journal)
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膝複合靭帯修復・再建術症例の検討 Reviewed
田島卓也、山本惠太郎、石田康行、山口奈美、﨑濱智美、帖佐悦男
Journal of Japanese Orthopaedic Society of Knee, Arthroscopy and Sports Medicine 37 126 - 127 2012.4
Language：Japanese Publishing type：Research paper (scientific journal)
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A Study of the knee multiple ligament reconstruction
TAJIMA Takuya
37 ( 1 ) 126 - 127 2012.3
Language：Japanese Publishing type：Research paper (scientific journal)
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Tajima T., Chosa E., Yamamoto K., Yamaguchi N.
Sports Medicine, Arthroscopy, Rehabilitation, Therapy and Technology 4 ( 1 ) 9 2012.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Sports Medicine, Arthroscopy, Rehabilitation, Therapy and Technology
Background: Recent years have seen anterior cruciate ligament (ACL) reconstruction being performed in a broad range of patients, regardless of age, sex and occupation, thanks to great advances in surgical techniques, surgical instruments and basic research. In cases of ACL reconstruction, bone-patellar tendon-bone (BTB) graft or hamstring graft are frequency used. However, potential complications associated with tunnel enlargement due to soft tissue graft such as hamstring were reported. On the other hand, an altered rotational axis resulting in significantly greater translation of the lateral compartment in the single bundle compared with double bundle ACL reconstruction was reported.Method and procedure: A reconstruction procedure was modified for the ACL using a double bundle that is the combination of BTB and gracilis tendon composite autograft. Two tibial and two femoral bone tunnels are used to reconstruct two bundles of ACL; an anteromedial bundle (AMB) and a posterolateral bundle (PLB). The femoral bone tunnels are created just posterior to the resident's ridge. The tibial bone tunnels are created at the center of AM and PL tibial attachment, respectively. BTB is fixed in the AM tunnels produced on the anatomical points of tibia and femur. The gracilis graft is fixed in an anatomical PL tunnel produced. The mean width of BTB is 7 mm, since10 mm graft is sometimes not suitable for patients, especially small Asian people and females. For these patients, 10 mm graft is bigger than one third of patella tendon width.Conclusion: The devised surgical procedure based on a combination of BTB and gracilis autograft is suitable reconstruction method for patients who have small or medium width of patellar tendon such as Asian people and females. This technique is also applicable to revision surgery. © 2012 Tajima et al; licensee BioMed Central Ltd.
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A Case of Chondroblastoma Generated in Humeral Caput
MIYAMOTO Naoko, YANO Hiroaki, YAMAMOTO Keitaro, ISHIDA Yasuyuki, TAJIMA Takuya, YAMAGUCHI Nami, SAKIHAMA Tomomi, NAGASAWA Makoto, CHOSA Etsuo
60 ( 4 ) 692 - 696 2011.9
Language：Japanese Publishing type：Research paper (scientific journal)
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A Study of Re-tear Cases after ARCR
ISHIDA Yasuyuki, CHOSA Etsuo, YANO Hiroaki, YAMAMOTO Keitaro, KAWAHARA Katsuhiro, TAJIMA Takuya, YAMAGUCHI Nami, SAKIHAMA Tomomi, NAGASAWA Makoto, KAWANO Keisuke
60 ( 3 ) 373 - 377 2011.9
Language：Japanese Publishing type：Research paper (scientific journal)
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Clinical outcome and the postoperative MRI findings of arthroscopic rotator cuff repair
ISHIDA Yasuyuki, YAMAMOTO Keitaro, TAJIMA Takuya, YAMAGUCHI Nami, SAKIHAMA Tomomi, CHOSA Etsuo
JOSKAS 36 ( 2 ) 212 - 216 2011.5
Language：Japanese Publishing type：Research paper (scientific journal)
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A study of the revision anterior cruciate ligament reconstruction
TAJIMA Takuya, YAMAMOTO Keitaro, ISHIDA Yasuyuki, YAMAGUCHI Nami, SAKIHAMA Tomomi, CHOSA Etsuo
36 ( 2 ) 258 - 263 2011.5
Language：Japanese Publishing type：Research paper (scientific journal)
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A Case of Chondroblastoma Generated in Humeral Caput
Miyamoto Naoko, Yano Hiroaki, Yamamoto Keitaro, Ishida Yasuyuki, Tajima Takuya, Yamaguchi Nami, Sakihama Tomomi, Nagasawa Makoto, Chosa Etsuo
Orthopedics & Traumatology 60 ( 4 ) 692 - 696 2011
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：West-Japanese Society of Orthopedics & Traumatology
Chondroblastoma is a comparatively rare tumor. It appear more commonly in many teens in the epiphyseal region of the long bones. We report one case of chondroblastoma, adding bibliographical discussion.<BR>The case was a 15-years-old woman. Pain in the right shoulder and limited range of motion were seen. After a year, right shoulder elevation became difficult. Because callus had been admitted in the humeral neck on X-rays, rehabilitation was enforced by diagnosing the fracture. Tumor was then detected in the right shoulder. Right dorsal was damaged by the physical education. Because the bone become transparent in the humeral on X-rays, MRI was done. Bone tumor was suspected as a result, and the case was introduced to this department. Biopsy indicated chondroblastoma, and bone tumor curettage and artificial bone grafting were carried out. There was no limitation of the range of motion of the right shoulder in the last follow-up.
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A Study of Re-tear Cases after ARCR
Ishida Yasuyuki, Kawano Keisuke, Chosa Etsuo, Yano Hiroaki, Yamamoto Keitaro, Kawahara Katsuhiro, Tajima Takuya, Yamaguchi Nami, Sakihama Tomomi, Nagasawa Makoto
Orthopedics & Traumatology 60 ( 3 ) 373 - 377 2011
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：West-Japanese Society of Orthopedics & Traumatology
Recently, good clinical outcomes of arthroscopic rotator cuff repair (ARCR) are reported, but the re-tear rate of massive and large rotator cuff tears is still high. The purpose of this study is to review the clinical outcome and postoperative cuff integrity of ARCR in our hospital. We evaluated 80 shoulders (61 males, 19 females), whose age rauged from 30 to 78 (average: 61.8 years old). The size of tears were 8 small, 22 medium, 36 large, and 14 massive. We evaluated the pre-and postoperative JOA scores, and MRI findings 12 months postoperatively. We evaluated the cuff integrity and fatty degeneration of the ruptured cuff by Goutallier's classification. Postoperative MRI findings showed complete repair in 56 shoulders (70%) and re-tear in 24 shoulders (30%). Postoperative JOA score was poor in cases with large re-tears. Retear rates were high in large and massive tears, tears with advanced fatty degeneration, and subscapularis tears. As this operation is not a replacement procedure, the quality of the ruptured rotator cuff is important. Further discussion on the operative indication and method is necessary.
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Clinical Results of Arthroscopic Surgery for Osteoarthritis of the Elbow
SAKIHAMA Tomomi, ISHIDA Yasuyuki, YANO Hiroaki, YAMAMOTO Keitaro, KAWAHARA Katsuhiro, TAJIMA Takuya, YAMAGUCHI Nami, FUKAO Yu, KAWANO Masamitsu, CHOSA Etsuo
59 ( 3 ) 533 - 535 2010.9
Language：Japanese Publishing type：Research paper (scientific journal)
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YAMAGUCHI Nami, YAMAMOTO Keitaro, ISHIDA Yasuyuki, KAWAHARA Katsuhiro, TAJIMA Takuya, CHOSA Etsuo, TAJIMA Naoya
30 ( 2 ) 79 - 86 2010.5
Language：Japanese Publishing type：Research paper (scientific journal)
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Bony PASTA lesion caused by shoulder hyperabduction injury
ISHIDA Yasuyuki, CHOSA Etsuo, YANO Hiroaki, YAMAMOTO Keitaro, KAWAHARA Katsuhiro, TAJIMA Takuya, YAMAGUCHI Nami, SAKIHAMA Tomomi
JOSKAS 35 ( 3 ) 468 - 471 2010.5
Language：Japanese Publishing type：Research paper (scientific journal)
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ISHIDA Yasuyuki, CHOSA Etsuo, YANO Hiroaki, YAMAMOTO Keitaro, KAWAHARA Katsuhiro, TAJIMA Takuya, YAMAGUCHI Nami, SAKIHAMA Tomomi
JOSKAS 35 ( 2 ) 338 - 341 2010.5
Language：Japanese Publishing type：Research paper (scientific journal)
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FUKAO Yu, YAMAMOTO Keitaro, YANO Hiroaki, KAWAHARA Katsuhiro, ISHIDA Yasuyuki, TAJIMA Takuya, YAMAGUCHI Nami, SAKIHAMA Tomomi, YAMAGUCHI Shihoko, CHOSA Etsuo
59 ( 1 ) 178 - 182 2010.3
Language：Japanese Publishing type：Research paper (scientific journal)
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KAWAHARA K., CHOSA E., YAMAMOTO K., TAJIMA T., SONODA N., TAJIMA N.
Japanese journal of clinical sports medicine 18 ( 1 ) 59 - 66 2010.1
Language：Japanese Publishing type：Research paper (scientific journal)
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Clinical Results of Arthroscopic Surgery for Osteoarthritis of the Elbow
Sakihama Tomomi, Ishida Yasuyuki, Yano Hiroaki, Yamamoto Keitaro, Kawahara Katsuhiro, Tajima Takuya, Yamaguchi Nami, Fukao Yu, Kawano Masamitsu, Chosa Etsuo
Orthopedics & Traumatology 59 ( 3 ) 533 - 535 2010
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：West-Japanese Society of Orthopedics & Traumatology
We report the short-term clinical results of arthroscopic surgery for osteoarthritis of the elbow with elbow pain or limitation range of motion.<BR>Five patients (five males, mean age: 54.0 years) were reviewed with minimum follow-up of four months after the operation. The average follow-up period was 14.2 months. The clinical results were Japanese Orthopaedic Association (JOA) elbow function score, range of motion before and after the operation. The presence of coexisting illness was evaluated.<BR>Their JOA score elbow function score increased from a mean of 69.0 points to 91.2 points. Flexion increased from a mean of 106.4 degrees to 115.6 degrees. Extension increased from a mean of -12.4 degrees to 3.6 degrees. But patiens with high limitation range of motion showed a tendency for low improvement level. There were no coexisting illnesses.<BR>Arthroscopic surgery for osteoarthritis of the elbow is a low invasive and effective procedure. But further study is necessary for patiens with high limitation range of motion.
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Fukao Yu, Chosa Etsuo, Yamamoto Keitaro, Yano Hiroaki, Kawahara Katsuhiro, Ishida Yasuyuki, Tajima Takuya, Yamaguchi Nami, Sakihama Tomomi, Yamaguchi Shihoko
Orthopedics & Traumatology 59 ( 1 ) 178 - 182 2010
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：West-Japanese Society of Orthopedics & Traumatology
The combined ligament injury of the knee is caused by traffic accidents and high-energy-sports etc., and often the choice of treatment for combined ligament injuries involving the posterior cruciate ligament of the knee is difficult. Posterior cruciate ligament injury is usually treated by conservative management, but recently combined ligament injuries involving the posterior cruciate ligament are treated by the surgery as that for other ligament injuries of the knee. Five knees treated by combined ligament reconstruction involving the posterior cruciate ligament between June 2005 and July 2008 are reported with bibliographical consideration.<BR>Two cases were injured by judo, and the other three cases were injured by skiing, traffic accident and falling respectively. All cases are male. Their mean ago was 29.0 years old (range: 17 to 42). Two cases injured PCL+ACL+MCL, and the other three cases injured PCL+ACL, PCL+MCL and PCL+LCL. These cases were treated by combined ligament reconstruction and repair. PCL was reconstructed with autogenic hamstring in all cases. The indication, method of reconstructions and postoperative results are discussed.
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矢野 浩明, 帖佐 悦男, 山本 惠太郎, 石田 康行, 河原 勝博, 田島 卓也, 山口 奈美, 崎濱 智美
臨床スポーツ医学 = The journal of clinical sports medicine 26 ( 8 ) 975 - 983 2009.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：文光堂
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前十字靭帯損傷患者のジョギングにおける動作分析 : 関節弛緩性の有無での比較
河原 勝博, 帖佐 悦男, 鳥取部 光司, 山本 惠太郎, 田島 卓也, 宮崎 茂明
運動療法と物理療法 = The Journal of physical medicine 20 ( 2 ) 2009.6
Language：Japanese Publishing type：Research paper (scientific journal)
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Anterior Cruciate Ligament Reconstruction for Middle-Aged Female Patients
YAMAGUCHI Shihoko, YAMAMOTO Keitaro, YANO Hiroaki, KAWAHARA Katsuhiro, ISHIDA Yasuyuki, TAJIMA Takuya, MITSUHASHI Ryuma, CHOSA Etsuo
58 ( 2 ) 192 - 198 2009.3
Language：Japanese Publishing type：Research paper (scientific journal)
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Anterior Cruciate Ligament Reconstruction for Middle-Aged Female Patients
Yamaguchi Shihoko, Yamamoto Keitaro, Yano Hiroaki, Kawahara Katsuhiro, Ishida Yasuyuki, Tajima Takuya, Mitsuhashi Ryuma, Chosa Etsuo
Orthopedics & Traumatology 58 ( 2 ) 192 - 198 2009
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：West-Japanese Society of Orthopedics & Traumatology
Cases of ACL reconstruction in the middle-aged persons (older than 40) have increased qmongst those receiving conservative treatment.<BR>The purpose of this study is to investigate the comparative results between the middle-aged female patients who have been received ACL reconstruction and those of young patients. Forty-three female patients (14 to 54 years) were operated on. The age of average was 29.8±11.9 years old.<BR>The course of ACL injury, waiting period until operation, complicating meniscus injury, OA change, JOA score, knee ROM, preoperative knee flexor and extensor muscle strength ant that 12 months after the operation were studied.<BR>JOA score and knee ROM were improved 12 months after operation. And there was no difference between the middle-aged women and women of other age groups.<BR>The waiting period tends to increase with age. 58% of the middle-aged women had meniscus injury. OA changes were seen in 91.7% of the middle-aged women and 16.7% in women of other age groups, indicating increased OA changes.<BR>Knee flexor muscle strength tends to decrease in middle age, but improves 12 months after surgery in other age groups as shown in our study. We also found that even though ACL reconstruction is an effective method, time to healing tends to be long in middle age, with prone ness to meniscus injury and decreasing knee flexor muscle strength.
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Arthroscopic decompression from subacrominal bursa for Paralabral cyst
ISHIDA Yasuyuki
33 ( 3 ) 2008.10
Language：Japanese Publishing type：Research paper (scientific journal)
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Safety evaluation for rugby-football competitions held in the Kyushu area
TAJIMA T., CHOSA E., YAMAMOTO K., KAWAHARA K., NAKAMURA Y., YOSHIKAWA D., YOSHIKAWA N., KASHIWAGI T., HIGASHIHARA J.
Japanese journal of clinical sports medicine 16 ( 3 ) 402 - 407 2008.8
Language：Japanese Publishing type：Research paper (scientific journal)
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石田 康行, 帖佐 悦男, 矢野 浩明, 山本 惠太郎, 河原 勝博, 田島 卓也
整形外科と災害外科 57 2008.5
Language：Japanese Publishing type：Research paper (scientific journal)
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Surgical Result of Arthroscopic Rotator Cuff Repair : a view of operative indications
ISHIDA Yasuyuki, CHOSA Etsuo, YANO Hiroaki, YAMAMOTO Keitaro, KAWAHARA Katsuhiro, TAJIMA Takuya
33 ( 2 ) 153 - 158 2008.4
Language：Japanese Publishing type：Research paper (scientific journal)
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A Case of Acromioclavicular Joint Ganglion after Arthroscopic Rotator Cuff Repair
SAKIHAMA Tomomi, ISHIDA Yasuyuki, YANO Hiroaki, YAMAMOTO Keitaro, KAWAHARA Katsuhiro, TAJIMA Takuya, SUGATA Koh, CHOSA Etsuo
57 ( 1 ) 162 - 166 2008.3
Language：Japanese Publishing type：Research paper (scientific journal)
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A Case of Acromioclavicular Joint Ganglion after Arthroscopic Rotator Cuff Repair
Sakihama Tomomi, Ishida Yasuyuki, Yano Hiroaki, Yamamoto Keitaro, Kawahara Katsuhiro, Tajima Takuya, Sugata Koh, Chosa Etsuo
Orthopedics & Traumatology 57 ( 1 ) 162 - 166 2008
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：West-Japanese Society of Orthopedics & Traumatology
Acromioclavicular joint (ACJ) ganglion in patients associated with massive cuff tear has been repoted. But we report a case of ACJ ganglion after arthroscopic rotator cuff repair. The case was a 62-year-old woman. She suffered right-hand massive rotator cuff tear in April 2006. She underwent rotator cuff tear repair by arthroscopic surgery. Seven month later, a soft-tissue mass developed above the right acromioclavicular region. Physical examination showed almost complete active motion and no impingement sign. Arthrogram of subacromial bursa indicated geyser sign. On MRI, the ganglion was found arising from the ACJ. Twelve-months after cuff tear repair, the ganglion was resected at the lateral end of the clavicle. At the six-months follow-up examination, the patient had no shoulder pain nor recurrence of ACJ ganglion.
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Treatment of Massive Rotator Cuff Tear with Axillary Nerve Palsy after Dislocation of Shoulder
ISHIDA Yasuyuki, CHOSA Etsuo, YANO Hiroaki, YAMAMOTO Keitaro, KAWAHARA Katsuhiro, TAJIMA Takuya, KOMAKI Yuka, HIGUCHI Seiji, SAKAI Takeshi, KAIDA Hiroshi
Orthopedics & Traumatology 56 ( 4 ) 525 - 528 2007.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：West-Japanese Society of Orthopedics & Traumatology
We report two good results after arthroscopic rotator cuff repair for massive rotator cuff tear with axillary nerve palsy after dislocation of the shoulder.<BR>Case 1: A 60 year-old man had fallen and dislocated his right shoulder.<BR>He visited our hospital six weeks after the injury because he was unable to raise his right shoulder. Muscle atrophy was found in the right deltoid. Numbness was found on the lateral-side of the right shoulder. Arthroscopic rotator cuff repair was performed three months after the injury. Before surgery, JOA score was 31 points, and improved to 94 points one year after surgery.<BR>Case 2: A 47 year-old man had fallen and dislocated his right shoulder.<BR>He visited our hospital three weeks after the injury, because he was unable to raise his right shoulder. Muscle atrophy was found in the right deltoid. Numbness was found on the lateral-side of the right shoulder. Denervation potential was observed in the right deltoid by electromyogram. Arthroscopic rotator cuff repair was performed one month after the injury. Before surgery, JOA score was 45 points, and improved to 93 points six months after surgery.<BR>Considering degeneration of the rotator cuff, early operation may be planned for the treatment of massive rotator cuff tear if nerve recovery prospects can be seen.
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Tajima T., Yoshida E., Yamashita A., Ohmura S., Tomitaka Y., Sugiki M., Asada Y., Maruyama M.
Journal of Orthopaedic Research 23 ( 4 ) 891 - 898 2005.7
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Orthopaedic Research
Intra-articular bleeding causes degradation of articular cartilage leading to joint disorders, but the mechanisms is not well understood. The present study examined the effect of hemoglobin on the ability of synovial tissues to produce plasminogen activators and matrix metalloproteinases that play important roles in the degradation of articular cartilage. Human Hb added to primary cultures of human knee synovial cells markedly increased fibrinolytic activity and gelatinolytic activity. The fibrinolytic activity was due to an increase in uPA activity. Western blot analysis and gelatin zymography indicated that the increased gelatinolytic activity was due to increased MMP-2 and -9. In order to know whether the effect of Hb on cultured synovial tissue is also true in in vivo system or not, rabbit hemoglobin was injected into rabbit knee joints. Coinciding with in vitro study, hemoglobin elicited considerable increase in fibrinolytic and gelatinolytic activity. The level of proteoglycan fragments in the hemoglobin-treated joint fluid was significantly elevated, indicating cartilage matrix degradation. Cartilage damage after hemoglobin treatment was also confirmed by histological study. These findings suggest that hemoglobin stimulates the secretion of uPA, MMP-2 and MMP-9 by synovial tissues, and raise a possible role of hemoglobin in joint damage after intra-articular bleeding. © 2005 Published by Elsevier Ltd. on behalf of Orthopaedic Research Society.
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Safety Evaluation of Rugby Football Competition
TAJIMA Takuya
25 ( 1 ) 2005.6
Language：Japanese Publishing type：Research paper (scientific journal)