腱板断端を近位に縫着する手技が関連する臨床所見と画像所見

概要

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Background: The purpose of this study was to investigate the effect of medial shift of the repair site of rotator cuff on clinical results and image findings. Methods: We examined 100 shoulders of 99 patients who underwent surgical therapy for rotator cuff tear. The distance from the greater tubercle to the repair site of the rotator cuff was measured by magnetic resonance imaging (MRI), and this value was used to determine the correlation of the shift with clinical results and image findings in 1year postoperatively. Patient age, size of rotator cuff tear, range of motion, muscle strength, Japanese Orthopaedic Association (JOA) score, width of supraspinatus and infraspinatus, fatty infiltration of supraspinatus and infraspinatus, and acromiohumeral interval (AHI) were evaluated. Results: The findings indicated that the medial shift of the repair site was not correlated with patient age, size of rotator cuff tear, range of motion, JOA score, or width of supraspinatus and infraspinatus. Further, the shift was positively correlated with fatty infiltration of supraspinatus and infraspinasus, and the shift was negatively correlated with AHI and muscle strength of external rotation. Discussion: Severity of fatty infiltration in supraspinatus and infraspinatus is related to the distance of medial shift, and it may influence the recovery of strength in the direction of external rotation and rotator cuff quality postoperatively.