CYCLIC INTRAMUSCULAR TEMPERATURE-FLUCTUATIONS IN THE HUMAN FOREARM DURING COLD-WATER IMMERSION
CYCLIC INTRAMUSCULAR TEMPERATURE-FLUCTUATIONS IN THE HUMAN FOREARM DURING COLD-WATER IMMERSION
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DOI：
10.1007/bf00233846
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发表时间：
1991-10-01
期刊：
影响因子：
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通讯作者：
RADOMSKI, MW
中科院分区：
文献类型：
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作者：
DUCHARME, MB;VANHELDER, WP;RADOMSKI, MW
本研究的目的是研究浸入 15 摄氏度水中的人体前臂的肌肉内温度波动。 在前臂浸没 3 小时期间，通过校准的多电偶探头连续监测组织温度 (T(t))。 探针沿尺骨脊植入距鹰嘴突远端约 90 mm 处。 从前臂纵轴（通过计算机断层扫描确定）到皮肤表面，每 5 毫米测量一次 T(t)。 除了 T(t) 之外，还测量了浸泡期间的直肠温度、皮肤温度和前臂热损失。 接受测试的六名受试者中有五名显示前臂的周期性温度波动仅限于肌肉组织。 浸泡开始后 75 (SE 6) 分钟观察到肌肉温度首次升高，周期持续时间平均为 36 (SE 3) 分钟。 肌肉温度的最大升高范围在 0.4 摄氏度到 1.0 摄氏度之间，是在前臂轴处测量的，并且与受试者前臂的周长呈负相关（P < 0.05）。 在整个浸泡过程中，没有观察到皮肤温度和前臂热损失的相应增加。 这些数据支持了肌肉血管在寒冷引起的前臂血管舒张过程中发挥重要作用的假设。
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 (T(t)) 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. T(t) was measured every 5 mm, from the longitudinal axis of the forearm (determined from computed tomography scanning) to the skin surface. Along with T(t), 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 < 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.