Department of Orthopedic Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Kyeonggi-do, Korea.
Clin Orthop Relat Res. 2010 Jun;468(6):1506-13. doi: 10.1007/s11999-009-1169-z.
The isokinetic muscle performance test (IMPT) is a validated and objective method used to evaluate muscle function but it is unknown whether it correlates with severity of rotator cuff tears.
QUESTIONS/PURPOSES: We asked whether peak torque and total work deficit on the IMPT correlated with the preoperative manual muscle test (MMT), tear size, fatty degeneration (FD) of cuff, and postoperative cuff integrity in patients after rotator cuff surgery.
We evaluated 221 patients who had undergone rotator cuff repair; of these 86 had the IMPT and a CT arthrogram (CTA) 1 year after surgery.
We found a correlation (r = 0.125 approximately 0.464) between the preoperative IMPT and MMT. The IMPT deficit was greater in rotator cuff muscles with larger tears and greater degree of FD. Preoperative external and internal rotation deficits on the IMPT were related to the risk of cuff detachment on the postoperative CTA (r = 0.290, 0.319), and the postoperative abduction deficit was greater than 40% of the contralateral side indicating cuff detachment.
The IMPT provides objective and quantitative data for estimating the preoperative status of rotator cuff tear and can provide baseline data for postoperative anatomic assessment in patients with rotator cuff disorders.
Level II, prognostic study. See the Guidelines for Authors for a complete description of levels of evidence.
等速肌力测试（IMPT）是一种经过验证的客观方法，用于评估肌肉功能，但尚不清楚其与肩袖撕裂的严重程度是否相关。
问题/目的：我们想知道在肩袖手术后，患者的 IMPT 峰值扭矩和总工作缺陷是否与术前手动肌肉测试（MMT）、撕裂大小、肩袖脂肪变性（FD）以及术后肩袖完整性相关。
我们评估了 221 例接受肩袖修复的患者；其中 86 例在术后 1 年进行了 IMPT 和 CT 关节造影（CTA）。
我们发现术前 IMPT 与 MMT 之间存在相关性（r = 0.125 至 0.464）。肩袖撕裂越大、FD 程度越高，IMPT 缺陷越大。术前 IMPT 外旋和内旋缺陷与术后 CTA 肩袖分离的风险相关（r = 0.290、0.319），术后外展缺陷超过对侧 40%表明肩袖分离。
IMPT 为评估肩袖撕裂的术前状态提供了客观和定量的数据，并可为肩袖疾病患者的术后解剖评估提供基线数据。
II 级，预后研究。有关证据水平的完整描述，请参见作者指南。
