Ducharme M B, VanHelder W P, Radomski M W
Defence and Civil Institute of Environmental Medicine, North York, Ontario, Canada.
Eur J Appl Physiol Occup Physiol. 1991;63(3-4):188-93. doi: 10.1007/BF00233846.
The purpose of the present study was to investigate the intramuscular temperature fluctuations in the human forearm immersed in water at 15 degrees C. Tissue temperature (Tt) was continuously monitored by a calibrated multicouple probe during 3 h immersion of the forearm. The probe was implanted approximately 90 mm distal from the olecranon process along the ulnar ridge. Tt was measured every 5 mm, from the longitudinal axis of the forearm (determined from computed tomography scanning) to the skin surface. Along with Tt, rectal temperature, skin temperature and heat loss of the forearm were measured during the immersions. Five of the six subjects tested showed evidence of cyclic temperature fluctuations in the forearm limited to the muscle tissue. The first increase of the muscle temperature was observed 75 (SE 6) min after the onset of the immersion, and the duration of the cycle averaged 36 (SE 3) min. The maximum increase of the muscle temperature, which ranged between 0.4 degrees C and 1.0 degrees C, was measured at the axis of the forearm, and was inversely correlated to the circumference of the subject's forearm (P less than 0.05). No corresponding increases of the skin temperature and heat loss of the forearm were observed for the complete duration of the immersion. These data support the hypothesis of a significant contribution of the muscle vessels during cold-induced vasodilatation in the forearm.
本研究的目的是调查将人类前臂浸入15摄氏度的水中时其肌肉内的温度波动情况。在前臂浸入水中3小时的过程中，使用校准过的多对电极探头持续监测组织温度（Tt）。探头沿着尺骨嵴植入，距离鹰嘴突约90毫米远。从前臂的纵轴（由计算机断层扫描确定）到皮肤表面，每隔5毫米测量一次Tt。在浸入过程中，同时测量直肠温度、皮肤温度和前臂的热量损失。在测试的6名受试者中，有5名显示前臂肌肉组织存在周期性温度波动迹象。浸入开始后75（标准误6）分钟观察到肌肉温度首次升高，周期持续时间平均为36（标准误3）分钟。肌肉温度的最大升高幅度在0.4摄氏度至1.0摄氏度之间，在前臂轴线上测得，且与受试者前臂周长呈负相关（P<0.05）。在整个浸入过程中，未观察到前臂皮肤温度和热量损失有相应升高。这些数据支持了肌肉血管在前臂冷诱导血管舒张过程中起重要作用这一假说。
