腱板断裂術後MRIにおける腱板高輝度変化の臨床的意味

概要

論文の詳細を見る
Many studies of MRI for preoperative evaluation of a rotator cuff tear have been reported on, but there are few reports relating to the efficacy of MRI for a postoperative evaluation. In particular, results of examinations of cases showing a high signal intensity change on MRI are conflicting. The purpose of this study was to evaluate the clinical significance of rotator cuff high signal intensity changes on MRI after rotator cuff repair. We investigated 40 shoulders showing rotator cuff high signal changes on MRI after rotator cuff repair at 6 months postoperative. We examined pain and range of motion using the UCLA score for clinical evaluation, and the SSP test, the Lift off test and manual muscle test as functional evaluations of the rotator cuff at 3 time points: preoperation, 6 months postoperative and 12 months postoperative. Pain, range of motion and rotator cuff function evaluations were improved significantly postoperation in comparison with preoperation evaluations. On ultrasonographic examination, 31(78%) out of 40 cases depicted a border echo between the rotator cuff and the deltoid at 6 months postoperative. In all examinations, there were no statistically significant differences between 6 and 12 months postoperative. Rotator cuffs had changed to low signal intensity on MRI in 24 (60%) out of 40 cases. From these results, it seems that MRI image evaluation is inadequate for determining postoperative rotator cuff function.