研究者詳細 - 齋藤　太一

論文 - 齋藤　太一

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Risk factors for extensor pollicis longus tendon rupture following non-displaced distal radius fractures

Taichi Saito, Tomoki Furutani, Ryo Nakamichi, Ryuichi Nakahara, Hidenori Kondo, Yasunori Shimamura, Junya Imatani, Toshifumi Ozaki

Injury 2025年8月

Novel Stress Tests for Diagnosing Little League Shoulder and Determining the Timing of Return to Sports

Takahiko Uchino, Yasunori Shimamura, Taichi Saito, Ryo Nakamichi, Toshifumi Ozaki

Orthopaedic Journal of Sports Medicine 2025年5月

記述言語：英語掲載種別：研究論文（学術雑誌）

<jats:sec>
<jats:title>Background:</jats:title>
<jats:p>The primary etiology of Little League shoulder (LLS) is rotational torque caused by repetitive throwing motion. However, there are few reports on the assessment of rotational torque during physical examination.</jats:p>
</jats:sec>
<jats:sec>
<jats:title>Purpose:</jats:title>
<jats:p>To investigate the usefulness of the resisted external rotation test (RERT) and the resisted internal rotation test (RIRT) in diagnosing LLS and determining the time to return to sports (RTS).</jats:p>
</jats:sec>
<jats:sec>
<jats:title>Study Design:</jats:title>
<jats:p>Case series (diagnosis); Level of evidence, 4.</jats:p>
</jats:sec>
<jats:sec>
<jats:title>Methods:</jats:title>
<jats:p>In total, 101 patients were diagnosed with LLS by proximal humeral physeal widening on radiography and tenderness on palpation over the lateral aspect of the proximal humerus, and the RERT and the RIRT were performed. During the 2 tests, the examiner lifted the patient’s elbow joint with one hand toward the humeral shaft and held the patient’s wrist joint with the other hand. In the RERT/RIRT, the patient was instructed to apply a maximal force of external/internal rotation from neutral alignment. The examiner resisted the force of external/internal rotation and maintained the setting position while holding the wrist joint. These test results were positive if either or both tests elicited shoulder pain. Positive test results and their association with radiographic findings were examined. In case of positive test results, the time to achieve negative test results and the time to RTS were investigated.</jats:p>
</jats:sec>
<jats:sec>
<jats:title>Results:</jats:title>
<jats:p>
The RERT and RIRT were correlated with severity of LLS. The sensitivity of RERT/RIRT for LLS was 94.1%/36.6%, respectively. In RIRT, patients with advanced-stage LLS were more likely to have positive results than those with early-stage LLS (67.4% vs 10.9%;
<jats:italic>P</jats:italic>
< .001). The mean time to achieve negative RERT and RIRT results was 6.7 and 4.7 weeks, respectively (
<jats:italic>P</jats:italic>
= .01). Patients with advanced-stage LLS had a longer mean time to achieve negative RERT results than those with early-stage LLS (6.7 vs 4.7;
<jats:italic>P</jats:italic>
< .001). The time to RTS was 8.8 weeks in the group that resumed throwing after achieving negative RERT, while the group that resumed throwing before RERT became negative took 12.7 weeks (
<jats:italic>P</jats:italic>
< .001).
</jats:p>
</jats:sec>
<jats:sec>
<jats:title>Conclusion:</jats:title>
<jats:p>The RERT may be useful in determining the presence of LLS and when RTS can be allowed.</jats:p>
</jats:sec>

DOI： 10.1177/23259671251331055

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Comparison of early clinical outcome in carpal tunnel release - mini-open technique with palmar incision vs. endoscopic technique with wrist crease incision. 国際誌

Ryo Nakamichi, Taichi Saito, Yasunori Shimamura, Masanori Hamada, Keiichiro Nishida, Toshifumi Ozaki

BMC musculoskeletal disorders 25 ( 1 ) 251 - 251 2024年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: The purpose of this study was to examine two techniques for Carpal Tunnel Syndrome, mini-Open Carpal Tunnel Release (mini-OCTR) and Endoscopic Carpal Tunnel Release (ECTR), to compare their therapeutic efficacy. METHODS: Sixteen patients who underwent mini-OCTR in palmar incision and 17 patients who underwent ECTR in the wrist crease incision were included in the study. All patients presented preoperatively and at 1, 3, and 6 months postoperatively and were assessed with the Visual Analogue Scale (VAS) and the Disabilities of Arm, Shoulder and Hand Score (DASH). We also assessed the pain and cosmetic VAS of the entire affected hand or surgical wound, and the patient's satisfaction with the surgery. RESULTS: In the objective evaluation, both surgical techniques showed improvement at 6 months postoperatively. The DASH score was significantly lower in the ECTR group (average = 3 months: 13.6, 6 months: 11.9) than in the mini-OCTR group (average = 3 months: 27.3, 6 months: 20.6) at 3 and 6 months postoperatively. Also, the pain VAS score was significantly lower in the ECTR group (average = 17.1) than in the mini-OCTR group (average = 36.6) at 3 months postoperatively. The cosmetic VAS was significantly lower in the ECTR group (average = 1 month: 15.3, 3 months: 12.2, 6 months: 5.41) than in the mini-OCTR group (average = 1 month: 33.3, 3 months: 31.2, 6 months: 24.8) at all time points postoperatively. Patient satisfaction scores tended to be higher in the ECTR group (average = 3.3) compared to the mini-OCTR group (average = 2.7). CONCLUSIONS: ECTR in wrist increase incision resulted in better pain and cosmetic recovery in an early postoperative phase compared with mini-OCTR in palmar incision. Our findings suggest that ECTR is an effective technique for patient satisfaction.

DOI： 10.1186/s12891-023-07151-w

PubMed

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前方及び後方アプローチを併用した尺骨鉤状突起および肘頭骨折を伴う肘関節脱臼開放骨折の1例

古谷友希, 齋藤太一, 中道亮, 島村安則, 西田圭一郎, 尾崎敏文

日本肘関節学会雑誌 31 ( 1 ) S84 - S84 2024年

The Effectiveness of Rehabilitation after Open Surgical Release for Trigger Finger: A Prospective, Randomized, Controlled Study

Taichi Saito, Ryo Nakamichi, Ryuichi Nakahara, Keiichiro Nishida, Toshifumi Ozaki

Journal of Clinical Medicine 12 ( 22 ) 7187 - 7187 2023年11月

掲載種別：研究論文（学術雑誌）出版者・発行元：MDPI AG

Background: It is not clear whether rehabilitation after surgery for trigger finger is effective. The aim of this study was to reveal its effectiveness for trigger finger. Methods: This study was a randomized, controlled trial that included patients who underwent operations for trigger fingers. The patients in the rehabilitation group had postoperative occupational therapy (OT) for 3 months, while the patients in the control group were not referred for rehabilitation but received advice for a range of motion exercises. We evaluated the severity of trigger finger, Disability of Arm-Shoulder-Hand (DASH) score, pain-visual analogue scale (VAS), grip strength, whether they gained a full range of motion (ROM), and complications before and after surgery. Results: Finally, 29 and 28 patients were included in the control and rehabilitation groups, respectively. At final follow-up, the DASH score, grip strength, and ROM were significantly improved in the rehabilitation group compared to that preoperatively. At final follow-up, pain was significantly improved in both groups from that preoperatively. There were no significant differences in the results, including the DASH score, grip strength, ROM and pain-VAS between the control and rehabilitation groups at the final follow-up. Subgroup analysis showed that there is a significant difference in the DASH score of patients doing housework or light work and those with a duration of symptoms >12 months between the control and rehabilitation groups at the final follow-up.

DOI： 10.3390/jcm12227187

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鎖骨骨折に対する治療戦略プレート骨接合術

島村安則, 斎藤太一, 中道亮

骨折 45 ( Suppl. ) S563 - S563 2023年6月

鏡視下手根管開放術と小切開手根管開放術の短期成績の比較検討

中道亮, 斎藤太一, 島村安則, 尾崎敏文

日本手外科学会雑誌 40 ( 1 ) O25 - 2 2023年4月

Fracture Line Distributions of Undisplaced Distal Radius Fractures in Relation to Rupture of the Extensor Pollicis Longus Tendon.

Hidenori Kondo, Taichi Saito, Ryuichi Nakahara, Ryo Nakamichi, Yasunori Shimamura, Ryozo Harada, Junya Imatani, Toshifumi Ozaki

Acta medica Okayama 77 ( 2 ) 179 - 184 2023年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

Rupture of the extensor pollicis longus (EPL) tendon is a known complication after undisplaced distal radius fracture (DRF). However, no report has revealed the relationship between EPL tendon rupture and the fracture pattern. Thus, this study aimed to investigate the characteristics of fractures at risk of EPL tendon rupture using fracture line mapping of undisplaced DRFs. This study used computed tomography imaging data of undisplaced DRFs with (n=18) and without EPL tendon rupture (n=52). Fracture lines obtained from 3D reconstruction data were drawn manually after matching with a 2D template wrist model. Fracture maps represented the fracture line distribution by superimposing the fracture lines of all 70 patients. Heat maps showed the relative frequency of the fracture lines as a gradual color change. Fracture lines of cases with EPL tendon rupture were concentrated in the proximal border of Lister's tubercle. By contrast, fracture lines of cases without EPL tendon rupture were relatively dispersed.

DOI： 10.18926/AMO/65147

PubMed

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弾発指に対する術後リハビリテーションの有効性

斎藤太一, 中道亮, 島村安則, 西田圭一郎, 尾崎敏文

日本手外科学会雑誌 40 ( 1 ) O32 - 2 2023年4月

野球選手における有鉤骨骨折に対する皮皺に沿った掌側進入法における手術治療成績

島村安則, 根津智史, 斎藤太一, 中道亮, 山脇正, 久禮美穂, 西田圭一郎, 尾崎敏文

日本手外科学会雑誌 40 ( 1 ) O38 - 5 2023年4月

成長期の関節疾患治療アップデート上腕骨小頭離断性骨軟骨炎の手術治療

島村安則, 斉藤太一, 中道亮, 尾崎敏文

日本整形外科学会雑誌 97 ( 2 ) S505 - S505 2023年3月

鎖骨骨折に対する治療戦略プレート骨接合術

島村安則, 斉藤太一, 中道亮

日本整形外科学会雑誌 97 ( 2 ) S482 - S482 2023年3月

関節面再建・温存手術上腕骨滑車部骨軟骨障害に対する鏡視下骨軟骨柱移植の治療成績

島村安則, 根津智史, 中道亮, 齋藤太一, 名越充, 尾崎敏文

日本肘関節学会雑誌 30 ( 1 ) S89 - S89 2023年2月

Panner病の治療成績

石原健嗣, 島村安則, 中道亮, 齋藤太一, 尾崎敏文

日本肘関節学会雑誌 30 ( 1 ) S312 - S312 2023年2月

Self-controlled case seriesを用いた内側型野球肘からTommy John手術へのリスク比

根津智史, 島村安則, 中道亮, 齋藤太一, 三橋利晴, 尾崎敏文

日本肘関節学会雑誌 30 ( 1 ) S80 - S80 2023年2月

Outcome of unlinked total elbow arthroplasty for rheumatoid arthritis in patients younger than 50 years old. 国際誌

Keiichiro Nishida, Yoshihisa Nasu, Kenzo Hashizume, Shunji Okita, Ryuichi Nakahara, Taichi Saito, Toshifumi Ozaki, Hajime Inoue

Bone & joint open 4 ( 1 ) 19 - 26 2023年1月

記述言語：英語掲載種別：研究論文（学術雑誌）

AIMS: There are concerns regarding complications and longevity of total elbow arthroplasty (TEA) in young patients, and the few previous publications are mainly limited to reports on linked elbow devices. We investigated the clinical outcome of unlinked TEA for patients aged less than 50 years with rheumatoid arthritis (RA). METHODS: We retrospectively reviewed the records of 26 elbows of 21 patients with RA who were aged less than 50 years who underwent primary TEA with an unlinked elbow prosthesis. The mean patient age was 46 years (35 to 49), and the mean follow-up period was 13.6 years (6 to 27). Outcome measures included pain, range of motion, Mayo Elbow Performance Score (MEPS), radiological evaluation for radiolucent line and loosening, complications, and revision surgery with or without implant removal. RESULTS: The mean MEPS significantly improved from 47 (15 to 70) points preoperatively to 95 (70 to 100) points at final follow-up (p < 0.001). Complications were noted in six elbows (23%) in six patients, and of these, four with an ulnar neuropathy and one elbow with postoperative traumatic fracture required additional surgeries. There was no revision with implant removal, and there was no radiological evidence of loosening around the components. With any revision surgery as the endpoint, the survival rates up to 25 years were 78.1% (95% confidence interval 52.8 to 90.6) as determined by Kaplan-Meier analysis. CONCLUSION: The clinical outcome of primary unlinked TEA for young patients with RA was satisfactory and comparable with that for elderly patients. A favourable survival rate without implant removal might support the use of unlinked devices for young patients with this disease entity, with a caution of a relatively high complication rate regarding ulnar neuropathy.Level of Evidence: Therapeutic Level IVCite this article: Bone Jt Open 2023;4(1):19-26.

DOI： 10.1302/2633-1462.41.BJO-2022-0151.R1

PubMed

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Panner病の治療成績と単純X線画像での離断性骨軟骨炎との鑑別

石原健嗣, 島村安則, 中道亮, 斎藤太一, 尾崎敏文

日本肘関節学会雑誌 30 ( 2 ) 222 - 228 2023年

Minimally Invasive Surgery for Trapezoid Nonunion: Case Report and Review of the Literature

Kohara, T., Saito, T., Shimamura, Y., Ozaki, T.

Journal of Hand Surgery Asian-Pacific Volume 28 ( 4 ) 2023年

尺骨突き上げ症候群に対する尺骨骨幹部短縮骨切り術と遠位部短縮骨切り術の治療成績の比較

齋藤太一, 中道亮, 島村安則, 西田圭一郎, 尾崎敏文

日本手外科学会雑誌 39 ( 3 ) 315 - 318 2022年12月

記述言語：日本語出版者・発行元：(一社)日本手外科学会

当院では以前より尺骨突き上げ症候群に対しては尺骨骨幹部での短縮骨切りを施行してきたが,近年皮膚切開量が短く,骨癒合が有利な尺骨遠位部での骨切りをおこなっている.今回骨切り部位別に治療成績を比較検討したので報告する.尺骨突き上げ症候群に対して骨切り術を行い,術後評価可能であった37例を対象とした.骨幹部骨切り症例は15例,遠位部骨切り症例は,22例含まれていた.これらの群に対して平均の骨癒合期間,握力,手関節可動域,DASH,Pain-VAS,および術後合併症をそれぞれ比較した.平均骨癒合期間は骨幹部骨切り群では3.3ヵ月,遠位部骨切り群では2.6ヵ月,術後1年経過時の握力については骨幹部,遠位部骨切り群それぞれ平均31.7kg,30.2kgであった.術後1年経過時の掌背屈可動域は骨幹部,遠位部骨切り群それぞれ150.0度,152.7度,回内外可動域は骨幹部,遠位部骨切り群それぞれ155.0度,170.1度であり,平均術後成績に有意差は認められなかった.DASHに関しては骨幹部骨切りでは23.9から20.1,遠位部骨切りでは33.3から9.9へと遠位部骨切りに関してのみ術後有意差をもって改善していた.またVASを用いた痛み評価では骨幹部骨切りでは7.2から1.0,遠位部骨切りでは5.8から1.2へとどちらの群も有意差をもって改善していた.(著者抄録)

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Five cases of atypical ulnar fractures associated with long-term bisphosphonate use: An anatomical and mechanical analysis using a finite element model

Shunji Okita, Taichi Saito, Norio Yamamoto, Yusuke Mochizuki, Ryuichi Nakahara, Yasunori Shimamura, Toshiyuki Kunisada, Keiichiro Nishida, Toshifumi Ozaki

Journal of Orthopaedic Science 2022年11月

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