著者

井口 理 Olsen B. S. Vaesel M. T. Johannsen H. V. Søjbjerg J. O.

出版者

Japan Shoulder Society

雑誌

肩関節 (ISSN:09104461)

巻号頁・発行日

vol.20, no.1, pp.87-90, 1996

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The intraarticular pressures of the glenohumeral joint were measured in 15 cadaveric shoulders during passive movement of the humerus and under various inferior loads on the humerus. Using the fiber-optic transducertipped catheter and air-tight connector, the basic intraarticular pressure was measured directly without the injection of any physiological saline solution the joint prior to the measurement. The initial intraarticular pressures were all negative with a mean value of -67.8 mmHg. During abduction-adduction movement the minimal intraarticular pressure was measured at 20 degrees of humeral abduction. During rotation, the minimal intraarticular pressure was observed at neutral humeral rotation. The intraarticular pressure decreased nearly linearly with the increasing inferior load on the humerus. These results indicate that the intraarticular pressure takes part in the stabilization of the glenohumeral joint and the negative intraarticular pressure of the glenohumeral joint induces the maximal stabilizing effect at 20 degrees of humeral abduction and neutral humeral rotation.