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The effect of tourniquet pressure on muscle function

Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, Connecticut

Patrick Ruwe

Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, Connecticut

Peter Jokl, MD

Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, Connecticut

Manohar Panjabi, PhD

Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, Connecticut

The adverse effects of excessive tourniquet pressure on underlying muscle were studied using a cat model. A direct effect of the magnitude of tourniquet pressure on the degree of muscle disability was observed. The effect of direct pressure on the muscle may contribute to the postoperative weakness seen in the quadriceps muscle. Our data, in conjunction with the results of other studies that correlate certain tourniquet times and pressures with potential adverse effects, suggest that the selection of an appropriate tourniquet pressure and duration will minimize the development of clinically sig nificant complications.

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