Observations on the Effects of Tourniquet Ischemia

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Abstract
The pH, PO2, and PCO2 in the blood of the extremity operated on under tourniquet control were studied at thirty minute intervals after tourniquet inflation. The degree of acidosis was determined at the various intervals. The post-tourniquet phase was likewise studied at five minute intervals. A discussion of the physiological state of the acidotic extremity as well as the physiological readjustment is presented. A scientific approach to determining a safe waiting period before reapplication of a tourniquet as well as an approach for managing the immediate post-tourniquet phase of an operation is suggested.

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