Local radiant heating increases subcutaneous oxygen tension

American Journal of Surgery
T IkedaJ M West

Abstract

We evaluated a novel bandage that incorporates a thermostatically controlled radiant heater. We first determined optimal bandage temperature, based on increases in subcutaneous oxygen tension, a measure correlating well with resistance to infection and wound strength. We then tested the hypothesis that prolonged radiant heating would increase collagen deposition in experimental thigh wounds. The experimental bandages were positioned on the anterior thigh of 8 volunteers, and heated for 2 hours at 38 degrees C, 42 degrees C, or 46 degrees C, in a random order. Subcutaneous oxygen tension under the bandage was recorded from an electrode positioned within a subcutaneous tonometer. We studied 10 volunteers in the second protocol. For 1 week, the experimental bandage was continuously applied to one thigh, and heated to 38 degrees C using a 2-hour on/off cycle. On the alternate week, a standard gauze bandage was applied to the contralateral thigh. Treatment order was randomly assigned. Wound collagen deposition under each bandage was evaluated with subcutaneous polytetrafluoroethylene tubes, which were removed and assayed for hydroxyproline on the eighth day. Data are presented as means +/- SDs. Skin temperature during heating ranged...Continue Reading

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Wound Repair and Regeneration : Official Publication of the Wound Healing Society [and] the European Tissue Repair Society
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