深部温度計による生体計測

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A method for the core temperature measurement from the body surface proposed by Fox and Solman (1971) was modified and applied to human subjects. This method measures the core temperature by creating a zone of zero heat-flow from the probe on the skin to the core. Deep body temperatures obtained with the transcutaneous probe were compared with rectal temperatures in 15 subjects (13 adults and 2 children). The subjects were lying on bed at an ambient temperature of 25℃, and transcutaneous probe was placed on the occipital region with a hair band. Rectal temperature was measured by a thermistor inserted about 80mm in the anal sphincter. In a few subjects, a thermocouple was inserted into the biceps muscle with an almost fixed elbow joint position to compare the muscle temperatures by direct and transcutaneous measurement. The mean rectal temperature was 36.77℃ and mean transcutaneous deep body temperature was 36.68℃. The correlation coefficient was 0.91. During the muscle exercise, the direct and the transcutaneous muscle temperature increased rapidly, but there was a slight difference between two measurements. The maximum transcutaneous probe temperature was lower by about 0.15℃ than the maximum muscle temperature measured by a thermocouple. In clinical application, we tried to measure deep body temperature continuously at various part of the body by attaching the transcutaneous probe to the patient's forehead (F), chestwall (D), palm (P) and heel (H). The deep body temperature at the central parts (at F and C) were found to be steady but peripheral ones (at P and H) were labile and showed rhythmic changes mostly in early morning. Forehead deep body temperature always highest among the transcutaneous measurements and was nearest to the central blood temperature measured during the cardiac catheterization. The results of simultaneous measurement with blood flow rate by electrical plethysmography at the human forearm showed that the deep body temperature well reflected the blood flow rate at the core muscle at the monitored site.
人間-生活環境系学会の論文
1978-12-08

深部温度計による生体計測

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