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首页> 外文期刊>Orthopaedic Journal of Sports Medicine >Does a Partial Rotator Cuff Tear Affect Pitching Ability? Results From an MRI Study
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Does a Partial Rotator Cuff Tear Affect Pitching Ability? Results From an MRI Study

机译：部分旋转器袖口撕裂会影响投球吗？ MRI研究结果

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Background: Numerous studies have examined changes in the athletic performance of baseball pitchers after rotator cuff surgery. However, only a few studies have evaluated changes in athletic performance caused by partial rotator cuff tears that are not treated surgically. Purpose: To examine the course of partial-thickness rotator cuff tears and its possible effect on the athletic performance of professional pitchers. Study Design: Case series; Level of evidence, 4. Method: Of 191 professional pitchers who attended our clinic between January 2009 and October 2018, 52 individuals had partial-thickness tears with at least 2 years of follow-up magnetic resonance imaging (MRI) scans and were included in this study. All initial MRI examinations were performed when a season was finished or during the off-season for regular medical check-up purposes. Hence, any abnormal finding on MRI, which suggests damage to the rotator cuff tendon, was assumed to have occurred during the previous season. The mean follow-up MRI period was 40.8 months (range, 24.4-100.9 months). We defined the year before an athlete’s first MRI at our clinic as the year of damage, and we evaluated athletic performance during the season before the damage (pre-damage year 1), the season of the damage (damage year), and 1 and 2 seasons after the damage (post-damage years 1 and 2). We evaluated the changes in 5 statistical performance indicators: earned run average (ERA), fielding independent pitching (FIP), walks plus hits divided by innings pitched (WHIP), winning percentage (WPCT), and innings pitched (IP). Results: The partial-thickness tears progressed in 39 of 52 (75%) patients. Of these 39 patients, 34 (87%) were grade 1 in severity and 5 (12.8%) were grade 2 or higher. The ERA of the pitchers did not increase significantly immediately after damage or at post-damage years 1 and 2. WPCT increased significantly compared with pre-damage year 1 ( P & .001), and IP decreased significantly during the follow-up period ( P & .001). Although no significant decrease in pitching ability was noted based on these 3 indices, significant increases were observed for FIP and WHIP. Conclusion: A partial-thickness rotator cuff tear does not have significant influence on the athletic performance of professional baseball pitchers in the short term based on conventional performance indicators. Our findings suggest that WHIP and IP decline significantly at 2 years after damage is noticed.
机译：背景：在旋转袖口手术后，许多研究检测了棒球投手运动性能的变化。然而，只有一些研究已经评估了由未手术治疗的部分旋转器袖带撕裂引起的运动性能的变化。目的：检查部分厚度转子袖口撕裂过程及其对专业投手运动性能的影响。研究设计：案例系列;证据级别，4.方法：191年1月在2009年1月和2018年10月之间参加了诊所的专业投手，52个个体具有部分厚度的泪液，至少有2年的后续磁共振成像（MRI）扫描并包含在内这项研究。当一个季节结束或在淡季期间进行常规医疗检查目的时，所有初始MRI考试都进行了所有初始的MRI考试。因此，假设在前季节发生了对MRI的任何异常发现，这表明对转子袖带肌腱造成损坏。平均后续MRI期为40.8个月（范围，24.4-100.9个月）。我们定义了在诊所的第一个MRI作为损坏年份的第一个MRI之前的年份，我们在季节评估了损害前（伤害年度第1岁），损害季节（损害年）和1季度的运动表现损坏后2个季节（损伤后1和2）。我们评估了5个统计绩效指标的变化：赢得了普通股平均值（时代），实地独立投球（FIP），散步加点分除了投球（鞭子），获胜百分比（WPCT）和局限（IP）。结果：部分厚度的泪液在52例（75％）患者中进展。在这39名患者中，34名（87％）的严重程度为1级，5（12.8％）为2级或更高。损坏或在损伤后的投手或在损伤后1岁后的时代没有显着增加，而2.与损伤前1（P＆ .001）相比，WPCT显着增加（P＆ .001），随访期间，IP显着下降（P＆ .001）。尽管基于这3个指标未注意到倾斜能力显着降低，但对于FIP和WHIP，观察到显着增加。结论：基于常规性能指标，部分厚度旋转器袖带对职业棒球投手的运动性能没有显着影响。我们的研究结果表明，注意到损坏后2年鞭打和IP在损坏后2年下降。

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