Abrams R M, Clapp J F, Notelovitz M, Tyler T, Cassin S
J Appl Physiol Respir Environ Exerc Physiol. 1977 Oct;43(4):747-9. doi: 10.1152/jappl.1977.43.4.747.
Thermojunctions were implanted in the brains of 10 near term fetal sheep in utero under halothane anesthesia. Brief total occlusion of fetal brachiocephalic artery was followed immediately by an increase in brain temperature (mean +/- SE) of 0.130 +/- 0.014 degrees C-min-1. Occlusion of main pulmonary artery and ascending aorta, simultaneously, led to a brain temperature increase of 0.144 +/- 0.018 degrees C-min-1. Specific heat of three fetal brains was determined to be 0.898 +/- 0.014 cal-g-1. degrees C-1 or 3.76 +/- 0.059 J-g-1. Rate of fetal brain heat production, computed as the product of the higher rate of temperature change and brain specific heat, was 0.129 +/- 0.014 cal-g-1-min-1 or 9.00 +/- 0.98 mW-g-1.
在氟烷麻醉下，将热电偶植入10只近足月子宫内胎羊的大脑中。短暂完全阻断胎儿头臂动脉后，大脑温度立即以0.130±0.014℃·min⁻¹的速率升高。同时阻断主肺动脉和升主动脉，导致大脑温度以0.144±0.018℃·min⁻¹的速率升高。测定三个胎脑的比热为0.898±0.014 cal·g⁻¹·℃⁻¹或3.76±0.059 J·g⁻¹。胎儿脑产热率通过较高温度变化率与脑比热的乘积计算得出，为0.129±0.014 cal·g⁻¹·min⁻¹或9.00±0.98 mW·g⁻¹。
