Effect of skin temperature on salt concentration of sweat.
Effect of skin temperature on salt concentration of sweat.
复制标题
皮肤温度对汗液盐浓度的影响。
DOI：
10.1152/japplphysiol.1950.2.12.654
复制
发表时间：
1950
影响因子：
3.3
通讯作者：
R. K. Kincaid
中科院分区：
文献类型：
--
作者：
S. Robinson;S. Gerking;E. Turrell;R. K. Kincaid
已经观察到汗液中氯化物浓度的广泛变化，在适应热的人中具有较低的值。一些早期的观察提供了证据，证明在热适应期间汗液氯化物的降低可能是由于随着温度调节的改善，皮肤和直肠温度降低。本文报道的研究计划调查汗腺温度对分泌汗液的盐浓度的直接影响。受试者是身体状况良好的年轻人。其中四个进行了研究，在不同程度的热适应。他们在一个炎热的环境中工作，从男人的手和前臂收集汗水进行分析，并戴上肘部长度的橡胶手套。手温保持在20°至35°C之间的任何所需水平，或高于37°C。在暴露过程中，受试者通过频繁地饮用定量的水来保持体重不变，当受试者的双手和前臂同时保持在不同的温度下时，从较冷的手收集的汗液中的钠和氯浓度明显低于另一只手。通过相应地升高或降低手的温度，在30分钟内升高或降低单手汗液的盐浓度。局部温度对汗液氯化物的影响与暴露期间的直肠温度无关。这是不依赖于从该地区的较高温度的出汗率的增加，它被发现在所有阶段的驯化。驯化减少了大量的汗水分泌在日常暴露在高温下工作时的手汗中的盐的浓度。在一系列的实验中，男性出汗5到6公斤。在暴露的第二天和第三天，适应环境导致汗液氯化物的显著减少。
Wide variations in the chloride concentration in sweat have been observed, with low values in persons acclimatized to heat. Some earlier observations gave evidence that the lowering of sweat-chloride during the days of acclimatization to heat may be due to the reduction of skin and rectal temperatures as température regulation improves. The study here reported was planned to investigate the direct effect of temperature of the sweat glands on the salt concentration of the sweat being secreted. The subjects were young men in good physical condition. Four of them were studied in varying degrees of acclimatization to heat. They worked in a hot environment, and sweat for analysis was collected from the men's hands and forearms in elbow-length rubber gloves. Hand temperatures were maintained at any desired level between 20° and 35°C., or above 37°C. During exposures the men kept their weights constant by drinking measured quantities of water at frequent intervals.When the two hands and forearms of a subject were simultaneously kept at different temperatures, the sodium and chloride concentration of sweat collected from the cooler hand was significantly lower than from the other. The salt concentration of sweat from a single hand was raised or lowered within 30 minutes by a corresponding raising or lowering of the hand temperature. This effect of local temperature on sweat chloride was independent of the rectal temperature during the exposure. It was not dependent on an increased rate of sweating from the region of higher temperature, and it was found at all stages of acclimatization.Acclimatization reduced the concentration of salt in hand-sweat when large volumes of sweat were secreted during daily exposures to work in the heat. In series of experiments in which men sweated 5 to 6 kgm. per day, acclimatization caused significant reductions of sweat chloride on the second and third days of exposure.Thomas Bedford.