Relationship between skin blood flow and sweating rate in prepubertal boys and young men.
Relationship between skin blood flow and sweating rate in prepubertal boys and young men.
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青春期前男孩和年轻男性皮肤血流量与出汗率的关系。
DOI：
10.1046/j.1365-201x.1999.00597.x
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
K. Hirata
中科院分区：
文献类型：
--
作者：
M. Shibasaki;Y. Inoue;N. Kondo;K. Aoki;K. Hirata
本研究旨在探讨热应激对皮肤血流量的影响及其机制。将8名青春期前男孩（7-11岁）和11名年轻男性（21-25岁）暴露于轻度被动加热[将小腿和脚置于42 ℃水浴中60 min，同时坐在中性空气条件（25 ℃，45%相对湿度）中]。没有观察到直肠温度升高的年龄相关差异[在被动加热结束时，男孩和男性分别为0.61 +/- 0.05（SEM）和0.62 +/- 0.09摄氏度]，被动加热期间的平均皮肤温度（34.51 +/- 0.28与34.81 +/- 0.27 ℃）或代谢产热（68 +/- 4与60 +/- 3 W m-2）。在加热过程中，激光多普勒血流仪（LDF）和局部出汗率（m（sw））的年龄相关差异因部位而异;与男性相比，男孩的胸部和背部LDF较大，前臂和大腿LDF相似，胸部和大腿m（sw）较低，背部相似（m）sw，前臂m（sw）较大。热暴露过程中LDF与m（sw）之间的关系分为三个时间阶段：（a）LDF增加而m（sw）不增加，（B）m（sw）增加而LDF不二次增加，（c）阶段（a）中LDF的成比例增加和LDF的m（sw）增加以及阶段（c）中LDF和m（sw）之间的回归线的斜率与男性相比，男孩的胸部和背部明显更大（P < 0.05），但前臂和大腿没有。这些结果表明，在男孩的躯干上观察到的更大的LDF可能是由于更大的血管收缩张力的撤回和更大的主动血管舒张。区域差异可能存在于血管收缩和血管舒张的成熟相关的变化。
We sought the mechanisms in the maturation-related change of skin blood flow to heat stress. Eight prepubertal boys (7-11 years) and 11 young men (21-25 years) were exposed to a mild passive heating [by placing the lower legs and feet in a 42 degrees C water bath for 60 min while sitting in a neutral air condition (25 degrees C, 45% relative humidity)]. No age-related differences were observed for the increase in rectal temperature [0.61 +/- 0.05 (SEM) vs. 0.62 +/- 0.09 degrees C in the boys and men at the end of the passive heating, respectively], mean skin temperature (34.51 +/- 0.28 vs. 34.81 +/- 0.27 degrees C) or metabolic heat production (68 +/- 4 vs. 60 +/- 3 W m-2) during the passive heating. During the heating age-related differences in skin blood flow by laser Doppler flowmetry (LDF) and local sweating rate (m(sw)) varied by site; the boys had greater LDF on the chest and back, similar LDF on the forearm and thigh, lower m(sw) on the chest and thigh, similar (m)sw on the back, and greater m(sw) on the forearm, compared with the men. The relationship between LDF and m(sw) during the heat exposure was divided into three temporal phases: (a) an increase of LDF without an increase in m(sw), (b) an increase of m(sw)without the secondary increase of LDF, (c) a proportional increase of LDF and m(sw) increase of LDF in phase (a) and the slopes of the regression lines between the LDF and m(sw) in phase (c) were significantly greater on the chest and back for the boys (P < 0.05), compared with the men, but not on the forearm and thigh. These results suggest that the greater LDF observed on the trunk in the boys may be owing to a greater withdrawal of vasoconstrictor tone and a greater active vasodilation. Regional differences may exist in the maturation-related alterations in vasoconstriction and vasodilation.
影响因子：
3.3
作者：
Kellogg, DL;Crandall, CG;Johnson, JM
通讯作者：
Johnson, JM
一氧化氮合酶抑制对人体发热期间皮肤血管舒张的影响。
DOI：
10.1152/jappl.1998.85.3.830
发表时间：
1998
期刊：
Journal of applied physiology (Bethesda, Md. : 1985)
影响因子：
--
作者：
Shastry,S;Dietz,NM;Halliwill,JR;Reed,AS;Joyner,MJ
通讯作者：
Joyner,MJ