| 摘要 |
Therapeutic abduction of the shoulder joint is achieved using a hinged device, the hinge activated by a cable passed between pulleys to increase mechanical advantage. The cable is wound on a spool mounted on a ratcheting mechanism, whereby tension is maintained as the spool is wound via a knob or computer controlled motor. A rotation control device enables rotation of the spool by a user, but prevents rotation due to a load. Mating shackles pivot in connection with the hinge, and are activated by the cable to increase the angle of the hinge. The hinge is connected to the body, one portion affixed relative to the body, the other affixed relative to the upper arm. As the hinge angle is expanded, the shoulder joint is abducted, stretching the tissue of the joint. If resilient, the cable imparts a dynamic tensioning force to the shoulder joint. Medial or lateral rotation is accomplished by a second device disposed at the elbow, wherein the pivot point of internal/external rotation is along the axis of the upper arm.
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