Prevents shoulder dislocation from downward gravitational pull of unsupported arms, promotes circulation by preventing venous pooling, reduces edema in arms or hands, and prevents flexion contractures of wrist.

• * 防止手臂未支撑时因下重作用牵拉引起肩膀脱位；防止静脉漩积，促进循环，减少手、水肿，防止腕部曲曲性挛缩。