腱板断裂患者における腱板筋の病理組織像と肩の筋力との関係

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The purpose of this study is to clarify the relationship between pathological findings and muscle strength of the shoulder associated with torn rotator cuff muscles. Materials of this study were fourteen shoulders in fourteen patients with rotator cuff tears, treated surgically in our hospital, and the size of the tear was equal to or less than 3cm. 8 were males, and 11 were females. The mean age at surgery was 65 years old. Needle biopsy was done in all cases using the 14G needle biopsy kit. The biopsy organization was stained using the H-E and Sudan III methods. We evaluated fatty infiltration between muscle fibers and patients were separated into fatty infiltration (+) and (-) groups. Isometric shoulder abduction and external rotation strength was examined with a micro FETTM, and compared with the other side. We analyzed the relationship between the pathological findings of only infraspinatus and muscle strength of the shoulder statistically. The average abduction strength was 68±23.4% (fatty infiltration (+) group) , and 59±19% (fatty infiltration (-) group) . There was no significant difference between the two groups in statistics. The average external rotation strength was 75±20.6% (fatty infiltration (+) group) , and 67±19.7% (fatty infiltration (-) group) . There was no significant difference between the two groups in statistics. In this study, the fatty infiltration on pathology in infraspinatus was not one of the important factors that affect the muscle strength of the shoulder.

腱板断裂患者における腱板筋の病理組織像と肩の筋力との関係

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