Details of a Researcher - Iwamoto, Takuji

Papers - Iwamoto, Takuji

Division display 21 - 40 of about 244 ／ All the affair displays >>

【肘関節疾患治療の最近の進歩】人工肘関節全置換術の合併症を防ぐための工夫

岩本卓士, 松尾知樹, 渡邉慎平, 清田康弘, 鈴木拓, 松村昇

整形・災害外科 (金原出版(株)) 68 ( 9 ) 1027 - 1031 2025.08

ISSN 0387-4095

＜文献概要＞人工肘関節全置換術(TEA)は有用な治療法であるが,他の人工関節置換術と比較して合併症発生率が高く,術後合併症予防が重要である。主な合併症はインプラントのゆるみ,脱臼,不安定性などであり,初回手術での対策が求められる。当科では,合併症低減を目指し,複数の戦略を実施している。具体的には,セメントレスunlinked型インプラントの選択,三次元術前計画による正確な設置,上腕三頭筋腱の連続性を温存する低侵襲アプローチを導入し,合併症低減に努めている。さらに,術中支援技術として拡張現実(AR)を活用したナビゲーションシステムの開発にも取り組み,TEAの安全性向上と良好な臨床成績の実現を目指している。

PIP関節強直に対するシリコンインプラントを用いた人工指関節置換術の短期成績

杉浦祐太郎, 鈴木拓, 早川克彦, 清田康弘, 佐藤和毅, 岩本卓士

日本手外科学会雑誌 ((一社)日本手外科学会) 41 ( 6 ) 644 - 647 2025.04

ISSN 2185-4092

PIP関節強直に対するシリコンインプラントを用いた人工指関節置換術の短期成績について報告する.平均PIP関節自動屈伸可動域は,術前が屈曲,伸展ともに0°であったが,最終観察時(平均35ヵ月)は屈曲63°,伸展-4°であり,インプラントの破損や緩みは認めなかった.PIP関節強直に対する人工関節置換術は,術前と比較してPIP関節自動屈伸可動域を改善し,短期的な成績は良好であったが,インプラントの破損も含めた長期的な経過観察が必要である.(著者抄録)

Webplasty using an external fixator for complex syndactyly caused by Apert syndrome

Kinoda A., Sato K., Iwamoto T., Matsumura N., Suzuki T., Kiyota Y., Kimura T., Nakamura T.

Journal of Orthopaedic Science 30 ( 2 ) 302 - 306 2025.03

ISSN 09492658

Background: Webplasty can be conducted for complex syndactyly caused by Apert syndrome (also referred to as Apert hand) by extending the soft tissue in the lateral direction using an external fixator. This study aimed to verify the usefulness of webplasty without skin grafting. Methods: Webplasty with lateral extension was conducted at a single institution from 2015 to 2023. The patients were four children with Apert hand aged 1–3 years. A custom-made small external fixator was used for all of the soft tissue extension. Results: Webplasty without skin grafting was completed by the time all five patients were 5–6 years of age. Conclusion: Webplasty without skin grafting was possible with lateral extension of the soft tissue using a simple external fixator.

Access to Document (DOI)

【手・手指の関節変形　基本の対処法】リウマチ母指変形の分類と治療選択

清田康弘, 岩本卓士

Orthopaedics ((株)全日本病院出版会) 38 ( 3 ) 39 - 47 2025.03

ISSN 0914-8124

母指は手全体の機能の約40%を担っており,母指の疾患は生活の質に深刻な影響を与える.特に関節リウマチ患者においては,母指の変形や機能障害が顕著で,日常生活動作に支障をきたすことになる.リウマチ母指変形はNalebuffにより6つのTypeに分類され,そのうち,Type Iボタン穴変形とType IIIスワンネック変形が多くみられる変形である.ボタン穴変形は主にMP関節の滑膜炎が原因で発生し,MP関節が屈曲し,IP関節が過伸展する.スワンネック変形は主にCM関節の滑膜炎が原因で発生し,CM関節が橈背側亜脱臼し,MP関節が過伸展,IP関節が屈曲する.リウマチ母指の治療には薬物,理学,手術療法があるが,治療の際には,それぞれの変形が生じるメカニズムを十分に理解することが必要である.そのうえで,IP,MP,CMの各関節の変性や拘縮の程度に応じて,治療法を選択する必要がある.(著者抄録)

Breast cancer statistics for Japan in 2022: annual report of the national clinical database-breast cancer registry-clinical implications including chemosensitivity of breast cancer with low estrogen receptor expression

Nagahashi, M; Kumamaru, H; Kinukawa, N; Iwamoto, T; Kawashima, M; Kinoshita, T; Konishi, T; Sagara, Y; Sasada, S; Saji, S; Sanuki, N; Tanakura, K; Niikura, N; Miyashita, M; Yoshida, M; Ishida, T; Taira, N

BREAST CANCER 32 ( 2 ) 217 - 226 2025.03

ISSN 1340-6868

Access to Document (DOI)

上腕骨近位部骨折続発症に対してPSIガイドを用いて人工肩関節置換を行った1例

岩間耕太, 松村昇, 清田康弘, 鈴木拓, 岩本卓士, 中村雅也

関東整形災害外科学会雑誌 (関東整形災害外科学会) 56 ( 1 ) 26 - 26 2025.02

ISSN 0389-7087

Modified Intravascular Stent for Microvascular Suture in a Rat Superficial Femoral Artery

Maeda K., Suzuki T., Masugi Y., Tsuji O., Iwamoto T., Nakamura M.

Annals of Plastic Surgery 94 ( 1 ) 107 - 113 2025.01

ISSN 01487043

Background Intravascular stent (IVaS) is sometimes used for suturing small vessels, but removing the stent after suturing is difficult. To overcome this problem, we developed an IVaS that integrates a stent and a manipulating string. This study aimed to investigate the usefulness of the modified IVaS (M-IVaS) by comparing it with conventional sutures (CS) and conventional IVaS (C-IVaS). Methods Forty-five superficial femoral arteries from rats were resected and sutured. The rats were randomly divided into the following 3 groups: CS, M-IVaS, and C-IVaS, with 15 rats per group. Patency rate, operating time, and ultrasonographic blood flow dynamics were examined immediately after suturing. Patency tests, ultrasonographic evaluations, and histological investigations were performed 1 week (n = 5), 2 weeks (n = 5), and 6 weeks (n = 5) after surgery. Results The 3 groups showed vessel patency in all cases immediately after suturing and at 1 week, 2 weeks, and 6 weeks after surgery. The mean operative time was 22.6 minutes for the CS group, 21.5 minutes for the M-IVaS group, and 25.9 minutes for the C-IVaS group. There were no significant differences in peak flow velocity and stenosis rate among the 3 groups as evaluated by ultrasonography. Histopathological evaluation revealed a similar recovery process of endothelial cells and no damage to the vascular wall. Conclusion The surgical time using M-IVaS was significantly shorter compared to that using C-IVaS. The M-IVaS reduced the inconvenience of C-IVaS removal. M-IVaS showed the same effectiveness as did the CS in terms of patency rate, operating time, ultrasonographic blood flow dynamics, and histological evaluation. M-IVaS can be used in the field of microsurgery.

Access to Document (DOI)

Effect of Alaska pollock-gelatin sheet on repair strength and regeneration of nerve

Tsujisaka R., Suzuki T., Shibata S., Iwamoto T., Taguchi T., Nakamura M.

Journal of Hand Surgery European Volume 50 ( 1 ) 76 - 84 2025.01

ISSN 17531934

The aim of the study was to investigate the repair strength and the biocompatibility of Alaska pollock-derived gelatin (ApGltn) sheet for nerve repair. Cadaveric digital nerves were repaired with double suture, single suture + ApGltn sheet, single suture + fibrin glue, single suture, ApGltn sheet and fibrin. Maximum failure loads were measured (20 nerves each). Rat sciatic nerves were repaired with double suture, single suture + ApGltn sheet, single suture, ApGltn sheet, fibrin glue and resection (10 nerves each). Macroscopic appearance, muscle weight and histopathological findings were examined 8 weeks postoperatively. The mean failure load of ApGltn sheet (0.39 N) was significantly higher than that of a fibrin (0.05 N), and that of single suture + ApGltn sheet (1.32 N) was significantly higher than that of a single suture alone (0.97 N). Functional and histological assessments showed similar nerve recovery among the suture, ApGltn and fibrin groups. ApGltn sheet has potential for clinical application as an alternative to fibrin.

Access to Document (DOI)

Point of care ultrasound combined with CTS-6 to diagnose idiopathic carpal tunnel syndrome

Kimura H., Furuhata R., Matsuo T., Suzuki T., Matsumura N., Sato K., Iwamoto T.

Journal of Orthopaedic Science 30 ( 1 ) 85 - 90 2025.01

ISSN 09492658

Background: This study aimed to demonstrate the effectiveness of our new diagnostic chart using point of care ultrasound combined with CTS-6 for diagnosing idiopathic carpal tunnel syndrome. Methods: We conducted a retrospective analysis of the data of patients who visited our department and received point of care ultrasound combined with CTS-6 from 2020 to 2023. Data regarding age, sex, initial and final diagnosis, cross-sectional area of the median nerve, CTS-6 score, and electrodiagnostic severity were obtained and statistically analyzed. Results: Of the 177 wrists included in our study, 138 (78 %) were diagnosed with carpal tunnel syndrome, while 39 (22 %) were not (non-carpal tunnel syndrome). With our diagnostic method, 127 wrists (72 %) were diagnosed initially with carpal tunnel syndrome, 23 wrists (13 %) with non-carpal tunnel syndrome, and the rest 27 wrists (15 %) as borderline. Our initial diagnoses of carpal tunnel syndrome and non-carpal tunnel syndrome were maintained in all cases except for two. Cross-sectional area, CTS-6 score, and electrodiagnostic severity showed a positive correlation. A post hoc analysis showed that the new scoring system (CTS-6 score + 2 × cross-sectional area) with a cutoff value of 31.25 points showed a sensitivity as high as 95 % and a specificity of 100 %. Conclusions: Our findings suggest that most suspected idiopathic carpal tunnel syndrome cases can be diagnosed correctly using the diagnostic chart. Although additional tools, including electrodiagnostic studies, may be needed for borderline cases, the use of point of care ultrasound combined with CTS-6 may be a recommendable first-line confirmatory test because point of care ultrasound and CTS-6 could be complementary tools, and this chart may be especially beneficial for atypical or outlier cases. Level of evidence: Diagnostic III.

Access to Document (DOI)

【生活習慣病と整形外科疾患】生活習慣病と手外科疾患

松尾知樹, 岩本卓士

臨床整形外科 ((株)医学書院) 60 ( 1 ) 41 - 45 2025.01

ISSN 0557-0433

＜文献概要＞手指拘縮,手根管症候群,狭窄性腱鞘炎,手指変形性関節症などは,しばしば遭遇する主要な手外科疾患である.その発症の危険因子にはさまざまなものが考えられているが,生活習慣病,特に糖尿病や肥満との関連が明らかになっている.特に高血糖状態は終末糖化産物であるadvanced glycation endproduct(AGE)を産生し,AGEがコラーゲンを架橋することで組織硬化をもたらし,手指拘縮,手根管症候群,狭窄性腱鞘炎の原因となり得る.また肥満については,脂肪組織から産生されるサイトカインにより手指変形性関節症を引き起こす可能性も示唆されている.本稿では糖尿病や肥満を中心に,各手外科疾患との関連を疫学や治療成績の観点から述べる.

手根管症候群における腱鞘滑膜へのアミロイド沈着と心アミロイドーシスの関連

御子柴直紀, 岩本卓士, 清田康弘, 鈴木拓, 松村昇, 佐藤和毅

日本手外科学会雑誌 ((一社)日本手外科学会) 41 ( 4 ) 317 - 320 2025.01

ISSN 2185-4092

手根管症候群は全身性アミロイドーシスの初発症状の一つであり,近年,手根管症候群に対する術中腱鞘滑膜生検のスクリーニングとしての意義が注目されている.2019年1月～2023年7月に当院で手根管症候群に対して手術を行い,術中に腱鞘滑膜生検を施行した40症例を対象に,アミロイド沈着と心アミロイドーシスの関連を検討した.循環器内科からの依頼により施行した症例は14例,スクリーニングとして施行した症例は26例であった.循環器内科からの依頼症例は14例中14例(100%)がアミロイド陽性であった.スクリーニング症例では26例中10例(38%)がアミロイド陽性で,特に男性は5例中5例(100%)が陽性であり,アミロイド陽性は,高齢,男性に有意に多かった.スクリーニング症例で心アミロイドーシスの診断に至った症例は1例(4%)であったが,心疾患の診断に至らなかった症例も今後,心アミロイドーシスを発症する可能性があり,術中腱鞘滑膜生検のスクリーニングとしての有用性の評価にはさらなる縦断的研究が必要である.(著者抄録)

Severe osteolysis following metacarpophalangeal arthroplasty with silicone implants: A case report

Kikuchi K., Iwamoto T., Kiyota Y., Torii A., Suzuki T., Matsumura N., Ueno A., Okita H., Nakamura M.

Modern Rheumatology Case Reports 9 ( 2 ) 2025

We report a rare case of severe osteolysis following metacarpophalangeal (MP) joint arthroplasty using silicone implants in a patient with rheumatoid arthritis. A 72-year-old woman presented with painless masses on the dorsum of the left hand 6 years after MP joint arthroplasty using Sutter-type silicone implants. Radiographic evaluation revealed implant-associated osteolysis and cortical perforation of the second to fifth metacarpals. Revision arthroplasty was performed using grommet-equipped Swanson-type silicone implants combined with synovectomy and iliac bone grafting for severe palmar bone loss. One year later, similar osteolysis occurred in the right hand, and revision arthroplasty was again performed using Swanson-type implants without the need for bone grafting. The postoperative course was uneventful, and no recurrence of osteolysis or implant-related complications was observed over a 7-year follow-up period. Silicone synovitis is a recognised complication of silicone implant arthroplasty, caused by wear debris triggering chronic inflammation and bone resorption. This case highlights the importance of early detection and intervention for implant-related osteolysis. In cases where bone defects remain manageable, revision with grommet-equipped silicone implants can be a viable and durable treatment option. Surgeons should be aware of this potentially severe complication, as delayed intervention may preclude the use of silicone implants altogether due to extensive bone loss.

Access to Document (DOI)

テニス選手の上腕骨滑車内側に生じた離断性骨軟骨炎に対して骨釘移植を行った一例

木之田章, 佐藤和毅, 山田唯一, 岩本卓士, 松村昇, 鈴木拓, 清田康弘, 吉田雅人

日本肘関節学会雑誌 (日本肘関節学会) 32 ( 1 ) S99 - S99 2025

ISSN 1349-7324

病変の再発と骨折により治療に難渋した肘関節滑膜軟骨腫症の1例

御子柴直紀, 岩本卓士, 清田康弘, 鈴木拓, 佐藤和毅

日本肘関節学会雑誌 (日本肘関節学会) 32 ( 2 ) 276 - 278 2025

ISSN 1349-7324

症例は40歳男性.4年前より誘因なく左肘関節の疼痛および可動域制限が出現し当院を紹介受診した.関節拘縮の状態であり,単純X線およびCTから関節内遊離体を伴う変形性肘関節症と判断し観血的関節授動術および遊離体摘出術を行った.術中に軟骨成分を多く含む多数の遊離体が摘出され,病理所見から滑膜軟骨腫症と診断した.一時的に肘関節可動域は改善したが術後経過とともに関節可動域は減少し,転倒により左上腕骨通顆骨折を受傷した.滑膜軟骨腫症の再発も認め,外固定での骨癒合後に2度目の観血的関節授動術と遊離体摘出術を行った.現在まで明らかな遊離体の再発を認めないが,肘関節には関節症性変化が生じており,強い可動域制限が残存した.画像所見で遊離体を認めた場合には,稀ではあるが本疾患を念頭に置いて治療を進める必要がある.(著者抄録)

Endoscopic-Assisted Infraclavicular Approach for Hypoplastic First Rib Resection in Thoracic Outlet Syndrome: A Case Report

Fumoto M., Suzuki T., Kiyota Y., Matsumura N., Iwamoto T., Nakamura M.

Jbjs Case Connector 14 ( 4 ) 2024.12

Case:A 25-year-old man presented with neck and upper-limb pain. He underwent surgery for the resection of a left hypoplastic first rib, which was causing thoracic outlet syndrome. The subclavian vein was retracted through an infraclavicular incision, and an endoscope was inserted dorsally to the vein. With the assistance of endoscopy, the first rib was partially resected, and scalene muscles were released from the rib. The preoperative symptoms improved after surgery without any complications.Conclusion:The endoscopic-assisted infraclavicular approach enabled sufficient resection of the hypoplastic first rib, leading to satisfactory outcomes. This method can be considered as an option for resecting a hypoplastic first rib.

Access to Document (DOI)

A case of concomitant subclavian steal syndrome and thoracic outlet syndrome

Kageyama A., Suzuki T., Kiyota Y., Matsumura N., Iwamoto T., Nakamura M.

Journal of Vascular Surgery Cases Innovations and Techniques 10 ( 6 ) 101613 2024.12

ISSN 2468-4287

A 59-year-old woman presented with dizziness and numbness of her left upper limb. Computed tomography (CT) angiography revealed an occlusion of the subclavian artery at its origin, leading to a diagnosis of subclavian steal syndrome. She was treated with percutaneous angioplasty and stenting; however, her symptoms did not improve. CT angiography of the arm in the elevated position revealed subclavian artery stenosis at the costoclavicular space, and the diagnosis was neurogenic thoracic outlet syndrome (TOS). First-rib resection was performed, and the symptoms disappeared immediately after surgery. TOS should be considered when symptoms persist despite subclavian steal syndrome treatment. Physical examination and CT imaging with the arm elevated aid in diagnosing TOS.

Access to Document (DOI)

Novel artificial nerve transplantation of human iPSC-derived neurite bundles enhanced nerve regeneration after peripheral nerve injury

Nishijima T., Okuyama K., Shibata S., Kimura H., Shinozaki M., Ouchi T., Mabuchi Y., Ohno T., Nakayama J., Hayatsu M., Uchiyama K., Shindo T., Niiyama E., Toita S., Kawada J., Iwamoto T., Nakamura M., Okano H., Nagoshi N.

Inflammation and Regeneration 44 ( 1 ) 6 2024.12

ISSN 1880-9693

Background: Severe peripheral nerve damage always requires surgical treatment. Autologous nerve transplantation is a standard treatment, but it is not sufficient due to length limitations and extended surgical time. Even with the available artificial nerves, there is still large room for improvement in their therapeutic effects. Novel treatments for peripheral nerve injury are greatly expected. Methods: Using a specialized microfluidic device, we generated artificial neurite bundles from human iPSC-derived motor and sensory nerve organoids. We developed a new technology to isolate cell-free neurite bundles from spheroids. Transplantation therapy was carried out for large nerve defects in rat sciatic nerve with novel artificial nerve conduit filled with lineally assembled sets of human neurite bundles. Quantitative comparisons were performed over time to search for the artificial nerve with the therapeutic effect, evaluating the recovery of motor and sensory functions and histological regeneration. In addition, a multidimensional unbiased gene expression profiling was carried out by using next-generation sequencing. Result: After transplantation, the neurite bundle-derived artificial nerves exerted significant therapeutic effects, both functionally and histologically. Remarkably, therapeutic efficacy was achieved without immunosuppression, even in xenotransplantation. Transplanted neurite bundles fully dissolved after several weeks, with no tumor formation or cell proliferation, confirming their biosafety. Posttransplant gene expression analysis highlighted the immune system’s role in recovery. Conclusion: The combination of newly developed microfluidic devices and iPSC technology enables the preparation of artificial nerves from organoid-derived neurite bundles in advance for future treatment of peripheral nerve injury patients. A promising, safe, and effective peripheral nerve treatment is now ready for clinical application.

Access to Document (DOI)

Prospective Study on Splinting for First Carpometacarpal Joint: A Comparison of Conventional and Three-Dimensional Printed Splint

Inaba N., Iwamoto T., Ishii K., Oki S., Suzuki T., Sato K., Nagura T., Nakamura M.

Journal of Clinical Medicine 13 ( 23 ) 2024.12

ISSN 2077-0383

Background: Patient compliance is a major concern of hand orthosis in first carpometacarpal osteoarthritis. To address this issue, we established a method for creating a custom-made three-dimensional printed splint based on computed tomography. This prospective study evaluates the usefulness of the three-dimensional printed splint compared with the conventional splint. Methods: A total of 12 hands in nine patients were included. The mean age of the patients was 69 years (range: 58–84). Conventional orthoses were made by prosthetists using molds. Three-dimensional printed orthoses (long and short types) were digitally designed from computed tomography data and created using Fused Deposition Modeling. Subjects were instructed to use three types of orthoses for 2 weeks each. They completed questionnaires that indicated pain, function, percentage of daytime spent using the orthosis, satisfaction score, and discomfort caused by wearing orthoses. Results: The pain on motion showed an improvement of approximately 20% for all orthoses. There was no significant difference in pain scale, function, percentages of daytime spent using each orthosis, and satisfaction score among the three types of orthoses. Discomfort caused by wearing orthosis was more frequent in conventional orthosis than in 3D-printed orthosis, and there was a significant difference between the conventional type and the long-type 3D-printed orthosis. Conclusions: This study suggests that 3D-printed splints provide comparable pain relief to conventional splints with reduced discomfort. However, limitations such as small sample size, short follow-up, and reliance on CT imaging highlight the need for further research.

Access to Document (DOI)

Accuracy of Implant Placement Based on Three-Dimensional Preoperative Planning in Total Elbow Arthroplasty

Matsuo T., Iwamoto T., Kiyota Y., Suzuki T., Matsumura N., Sato K.

Journal of Hand Surgery Asian Pacific Volume 29 ( 5 ) 397 - 407 2024.10

ISSN 24248355

Background: Accurate implant placement in the optimal position is important to obtain favourable clinical outcomes and prevent complications in total joint arthroplasty. We aimed to assess the accuracy of implant placement based on three-dimensional (3D) preoperative planning for unlinked total elbow arthroplasty (TEA) and to clarify the effect of implant placement on clinical outcomes. Methods: This study included 20 patients (22 elbows, 17 with rheumatoid arthritis and 5 with osteoarthritis, with a mean follow-up period of 47 months) who underwent TEA with an unlinked-Type implant after computed tomography (CT)-based 3D preoperative planning. Implant placement was planned preoperatively and several parameters were set to reflect it intraoperatively. TEA was performed based on the plan, and postoperative CT was conducted to evaluate differences in implant placement by comparing the preoperative plan and postoperative implant placement. Furthermore, we evaluated the relationship between implant placement differences and postoperative clinical outcomes, including range of motion, Visual Analogue Scale, Mayo Elbow Performance Score 1 year after surgery and complications at the last follow-up. Results: The mean absolute translation was within 2 mm, the mean absolute tilt was within 4°, the mean absolute rotation of the humeral component was within 4° and the mean absolute rotation of the ulnar component was 10.2° ± 6.8°. In the ulnar components, 15/22 (68%) cases were externally rotated, and the mean external rotation was 7.1° ± 10.2°. We defined the absolute ulnar component's rotational difference of more than 10° as a 'malrotation' group (n = 8) and 10° or less as a 'control' group (n = 14). We compared the clinical outcomes between both groups, however, no significant differences were observed in clinical outcomes and complications. Conclusions: We observed notable malrotation in the postoperative positioning of the ulnar component. Intraoperative support devices may be necessary to accurately reproduce the preoperative plan in the surgical field. Level of Evidence: Level IV (Therapeutic)

Access to Document (DOI)

T2 magnetic resonance imaging mapping and morphology of the median nerve before and after surgery in carpal tunnel syndrome

Kondo H., Suzuki T., Hayakawa K., Maeda A., Funahashi T., Kuroiwa T., Kawano Y., Iwamoto T., Fujita N.

Muscle and Nerve 70 ( 3 ) 346 - 351 2024.09

ISSN 0148639X

Introduction/Aims: T2 magnetic resonance imaging (MRI) mapping has been applied to carpal tunnel syndrome (CTS) for quantitative assessment of the median nerve. However, quantitative changes in the median nerve before and after surgery using T2 MRI mapping remain unclear. We aimed to investigate whether pathological changes could be identified by pre- and postoperative T2 MRI mapping of the median nerve in CTS patients after open carpal tunnel release. Methods: This was a prospective study that measured median nerve T2 and cross-sectional area (CSA) values at the distal carpal tunnel, hamate bone, proximal carpal tunnel, and forearm levels pre- and postoperatively. Associations between T2, CSA, and nerve conduction latency were also evaluated. Results: A total of 36 patients with CTS (mean age, 64.5 ± 11.7 years) who underwent surgery were studied. The mean preoperative T2 values significantly decreased from 56.3 to 46.9 ms at the proximal carpal tunnel levels (p =.001), and from 52.4 to 48.7 ms at the hamate levels postoperatively (p =.04). Although there was a moderate association between preoperative T2 values at the distal carpal tunnel levels and distal motor latency values (r = −.46), other T2 values at all four carpal tunnel levels were not significantly associated with CSA or nerve conduction latency pre- or postoperatively. Discussion: T2 MRI mapping of the carpal tunnel suggested a decrease in nerve edema after surgery. T2 MRI mapping provides quantitative information on the median nerve before and after surgery.

Access to Document (DOI)

　 Previous page - Next page 　