棘上筋腱単独断裂の肩外転及び外旋筋力 Isokinetic Strength of a Isolated Supraspinatus Tendon Rupture

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The purpose of this study was to clarify the isokinetic strength of the shoulder abduction and external rotation in tears of the isolated supraspinatus tendon.<BR>Isolated tears of the supraspinatus tendon were present in 7(area<4cm<SUP>2</SUP> on MRI),7 shoulders(7 patients)without a history of shoulder pain on the contralateral side were enrolled in this study. Their mean age was sixty-five years (50 to 78). We measured the isokinetic strength of abduction and external rotation of both shoulders using a Cybex 6000 isokinetic dynamometer (Cybex, Division of Lumex, New York). The strength of abduction was measured with the patients seated on a chair. The test was carried out between 0° and 110° of abduction at angular velocities of 60 °/s and 180° /s. The strength of external rotation was tested with the subject standing with the elbow flexed to 90° and carried out between 45° of internal rotation and 45° of external rotation. To relieve pain we then injected 5ml of 1% carbocaine into the glenohumeral joint.<BR>The peak torque which were the highest torque value seen from all repetitions were measured and expressed percentages of those of the contralateral side. The abduction strength of the isolated supraspinatus tears as percentages of those of the contrateral side was 67.0±9.2% at 60°/sand70.1±8.3% at 1800/s. The external rotation strength of the isolated supraspinatus tears as percentages of those of the contralateral side was 67.0±23.8% at 60°/s and 71.9±24.4% at180°/s.<BR>The decreases in isokinetic strength in abduction and external rotation of the isolated supraspinatus tendon rupture was about 30% of the contralateral side.

収録刊行物

  • 肩関節 = Shoulder joint

    肩関節 = Shoulder joint 23(2), 189-192, 1999-07-30

    Japan Shoulder Society

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