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Effects of changes in posture upon plethysmogram and skin temperature are investigated. Since posture, by altering venous return, affects pulse volume and response of digital volume and skin temperature to procedures releasing sympathetic tone, these should not be interpreted solely in terms of arterial blood flow. In the normal elevated limb, e.g., the skin temperature response to body heating simulates organic arterial disease. The clinical significance of these findings is discussed with particular reference to interpretation of skin temperature readings, the diagnosis of thromboantiitis obliterans, indications for sympathectomy in poliomyelitis, the management of the edematous limb and other conditions.

Effect of Changes in Posture on Peripheral Circulation, with Special Reference to Skin Temperature Readings and the Plethysmogram