Shoulder position increases ulnar nerve strain at the elbow of patients with cubital tunnel syndrome

Kensuke Ochi, Yukio Horiuchi, Koichi Horiuchi, Takuji Iwamoto, Yasushi Morisawa, Kazuki Sato

研究成果: Article査読

9 被引用数 (Scopus)

抄録

Background: Previous studies have shown that the shoulder internal rotation elbow flexion (SIREF) test, which is a modified elbow flexion (EF) test, has significantly higher sensitivity than the EF test in patients with cubital tunnel syndrome (CubTS). Here, we hypothesized that this increase in sensitivity was due to increase in the ulnar nerve strain around the elbow introduced by the additional shoulder position. Methods: Ulnar nerve strain at the elbow was intraoperatively measured at both the EF test and SIREF test positions in 20 patients with CubTS before simple decompression. Statistical analysis was performed with the Wilcoxon signed rank test at a confidence level of 99% (. P < .001). Results: Mean ulnar nerve strain in the EF test position was 18.9% ± 12.1%, whereas that in the SIREF test position was 24.7% ± 14.0%. Ulnar nerve strain was higher in the SIREF than in the EF test position in all cases, and the difference was significant (mean, 5.8% ± 0.9%; 95% confidence interval, 3.90%-7.73%). Conclusion: This study indicated that increased sensitivity in the SIREF test compared with the EF test was due to the increase in ulnar nerve strain around the elbow. To the best of our knowledge, this is the first study showing that shoulder position changes the ulnar nerve strain around the elbow in living patients with CubTS.

本文言語English
ページ(範囲)1380-1385
ページ数6
ジャーナルJournal of Shoulder and Elbow Surgery
24
9
DOI
出版ステータスPublished - 2015 9月 1

ASJC Scopus subject areas

  • 外科
  • 整形外科およびスポーツ医学

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