Convective warming after hypothermic cardiopulmonary bypass

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Abstract
In a randomized, controlled study, we found that convective warming after hypothermic cardiopulmonary bypass did not accelerate the rate of warming of the body core or the time to tracheal extubation. The relationship between body core and shell temperature, however, was affected. In all patients inadequate time spent rewarming on cardiopulmonary bypass prolonged body core warming time and time to tracheal extubation. Rate of warming of body core was inversely related to body mass index. Convective warming was delivered using BairHugger (Augustine Medical Inc., MN, USA) and WarmTouch (Mallinckrodt Medical UK Ltd, Northampton, UK) blankets. There was no difference between the performance of each blanket when powered by the BairHugger 500 power unit set at its medium setting of 38 °C, and when chest drain and radial artery cannulation sites were left exposed for observation.

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