The dart thrower's path defined the transition between flexion and extension rotation of the scaphoid and lunate, and it identified wrist positions at which scaphoid and lunate motion approached zero. These findings indicate that this path of wrist motion confers a unique degree of radiocarpal stability and suggests that this direction, rather than the anatomical directions of wrist flexion-extension and radioulnar deviation, is the primary functional direction of the radiocarpal joint.

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Due in part to an emphasis on quality and cost control within healthcare institutions, protocols for healthcare practice are increasingly being developed in an effort to maintain normative guidelines and set acceptable standards. For example, the Association of periOperative Registered Nurses, the National Quality Forum, and the Association of Surgical Technologists have made recommendations regarding tourniquet use. In the institution of the senior authors (C.D. and E.A.), an effort to establish a protocol for tourniquet use prompted a review of the evidence behind standard practices and existing recommendations for safe tourniquet use in the upper and lower extremities. Sparse evidence exists in support of strict limits for tourniquet use, including tourniquet duration, inflation pressure, and reperfusion periods. However, simple principles and general guidelines regarding tourniquet use can be extrapolated to guide safe practice.

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