Dynamic adjustable shoulder orthosis with rehabilitation by adduction

Abstract

A shoulder orthosis is provided for maintenance of a patients arm in a postoperative shoulder immobilization posture in the context of tearing of rotator cuff muscles. The orthosis comprises a belt, an arm splint, and a column member with axial mechanical spring continuously adjustable by a manual adjustment handle and interconnecting the belt to the splint and biasing the splint to an abduction upper limit position. The orthosis provides stable support for the patients forearm around a horizontal plane, while allowing pivoting movement of the patients injured arm about a vertical axis intersecting the patients elbow and approaching the patients torso in a transverse plane. This orthosis also allows a cyclical back and forth movement of the splint, the free downward movement of the patients arm by his healthy muscles, assisted by the adductor muscles against the bias of the adjustable spring without active movement of the rotator cuff. A control handle incrementally locks the spring in a selected retracted position of the axial spring. The axial spring column member remains closely spaced against the patients torso during movements of the splint relative to the patients waist belt.