Papers - TAJIMA Takuya
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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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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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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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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).