Method for measuring regional heat losses in man.

Flexible heat flow devices were constructed from 0.4-mm-thick nylon-reinforced rubber sheet, with multiple copper-constantan thermocouples on each side to measure mean temperature difference across the sheet. A method of calibration is described that corrects for the alteration of local heat loss produced by the device itself. It was shown that such errors would otherwise be large when cutaneous blood flow was high, and tissue insulation low, even with devices as thin as these.