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最終更新日：2024/10/02

渡邉 秀

ワタナベ シュウ (Shu Watanabe)
論文
タイトル
タイトル（英）
Influence of Injury to the Kaplan Fibers of the Iliotibial Band on Anterolateral Rotatory Knee Laxity in Anterior Cruciate Ligament Injury: A Retrospective Cohort Study.
参照URL
https://researchmap.jp/shuwatanabe/published_papers/44487327
著者
著者（英）
Watanabe S,Kanto Nagai,Hoshino Y,Kataoka K,Nakanishi Y,Daisuke Araki,Kanzaki N,Takehiko Matsushita,Kuroda R
担当区分
筆頭著者
概要
概要（英）

Background

Biomechanical cadaveric studies have shown that Kaplan fibers (KFs) of the iliotibial band play a role in controlling anterolateral rotatory knee laxity in anterior cruciate ligament (ACL) injury. However, in the clinical setting, the contribution of injury to KFs on anterolateral rotatory laxity remains unclear.

Purpose

To use magnetic resonance imaging (MRI) scans to detect concomitant KF injury in ACL-injured knees and to then examine the effect of KF injury on anterolateral rotatory laxity as measured by the pivot-shift test in a clinical setting.

Study design

Cross-sectional study; Level of evidence, 3.

Methods

The study enrolled 91 patients with primary ACL tears (mean age 25 ± 11 years; 46 male and 45 female) whose MRI was conducted within 90 days after injury. KF injury was assessed by MRI according to previously reported criteria, and the patients were allocated to a KF injury group and a no-KF injury group. At the time of ACL reconstruction, the pivot-shift test was performed with the patient under anesthesia and quantitatively evaluated by tibial acceleration using an electromagnetic measurement system. Manual grading of the pivot-shift test was assessed according to guidelines of the International Knee Documentation Committee. The data were statistically compared between the 2 groups using Mann-Whitney U test and Fisher exact test (P < .05).

Results

KFs were identified in 85 patients (93.4%), and KF injury was detected in 20 of the 85 patients (23.5%). No significant differences were observed between the KF injury group (n = 20) and the no-KF injury group (n = 65) in demographic characteristics, the period from injury to MRI (8.0 ± 14.0 days vs 8.9 ± 12.1 days, respectively), the rate of meniscal injury (50.0% vs 53.8%), or the rate of anterolateral ligament injury (45.0% vs 44.6%). Regarding the pivot-shift test, no significant differences were observed in tibial acceleration (1.2 m/s2 [interquartile range, 0.5-2.1 m/s2] vs 1.0 m/s2 [interquartile range, 0.6-1.7 m/s2], respectively) or manual grading between the 2 groups.

Conclusion

Concomitant KF injury did not significantly affect the pivot-shift phenomenon in acute ACL-injured knees. The findings suggest that the contribution of KF injury to anterolateral rotatory knee laxity may be limited in the clinical setting.
出版者・発行元
出版者・発行元（英）
誌名
誌名（英）
The American journal of sports medicine
巻
号
開始ページ
終了ページ
出版年月
2022年8月22日
査読の有無
査読有り
招待の有無
掲載種別
研究論文（学術雑誌）
ISSN
DOI URL
https://doi.org/10.1177/03635465221116097
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