Augmentation of blood circulation to the fingers by warming distant body areas
Augmentation of blood circulation to the fingers by warming distant body areas
复制标题
通过温暖远处的身体区域来增强手指的血液循环
DOI：
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复制
发表时间：
2000
影响因子：
3
通讯作者：
I. Linder
中科院分区：
文献类型：
--
作者：
V. Koscheyev;G. R. Leon;S. Paul;D. Tranchida;I. Linder
未来的太空活动将需要更长的时间在极端环境中，在这种环境中，身体外围容易受到寒冷的影响。保持手和手指在舒适的条件下，可以提高手指的灵活性和灵巧性，从而达到更好的工作表现。我们已经评估了促进四肢热量传递和释放的功效通过增加血液从身体较远的部位流向外围。研究者开发的实验服装模式被用于控制不同身体区域的温度。6名受试者，2名女性和4名男性，在第一阶段基线条件下进行评估，液冷/暖衣（LCWG）循环水入口温度为33°C。在阶段2中，整个LCWG进水温度被冷却到8°C，在阶段3中，LCWG特定部分的进水温度被加热（根据协议）到45°C，而其余部分的进水温度保持在8°C。以下四种身体区域变暖的条件分别被研究：(1)头部，(2)上肢/手臂，(3)上肢/手臂/头部，(4)腿/脚。评估手指的皮肤温度、热通量和血液灌注，以及热感觉的主观感知和整体身体舒适度。手指温度（Tfing）分析显示有统计学意义的条件-阶段相互作用。事后比较（Tfing）表明，在第3阶段，上肢/手臂/头部温暖条件与头部，上肢/手臂和腿/脚条件显著不同，显示Tfing增加。在所有情况下，第三阶段手指血流灌注明显增加。在第3阶段上肢/手臂/头部状态下，手部温暖的主观知觉和整体身体舒适度显著增加。研究结果表明，通过生理方法增强防护服内血液向外周的热量传递，为提高极端环境下人体的整体和局部舒适度提供了额外的工具。
Abstract Future activities in space will require greater periods of time in extreme environments in which the body periphery will be vulnerable to chilling. Maintaining the hands and fingers in comfortable conditions enhances finger flexibility and dexterity, and thus effects better work performance. We have evaluated the efficacy of promoting heat transfer and release by the extremities by increasing the blood flow to the periphery from more distant parts of the body. The experimental garment paradigm developed by the investigators was used to manipulate the temperature of different body areas. Six subjects, two females and four males, were evaluated in a stage-1 baseline condition, with the inlet temperature of the circulating water in the liquid cooling/warming garment (LCWG) at 33 °C. At stage 2 the total LCWG water inlet temperature was cooled to 8 °C, and at stage 3 the inlet water temperature in specific segments of the LCWG was warmed (according to protocol) to 45 °C, while the inlet temperature in the rest of the LCWG was maintained at 8 °C. The following four body- area-warming conditions were studied in separate sessions: (1) head, (2) upper torso/arm, (3) upper torso/arm/head, and (4) legs/feet. Skin temperature, heat flux and blood perfusion of the fingers, and subjective perception of thermal sensations and overall physical comfort were assessed. Finger temperature (Tfing) analyses showed a statistically significant condition × stage interaction. Post-hoc comparisons (Tfing) indicated that at stage 3, the upper torso/arm/head warming condition was significantly different from the head, upper torso/arm and legs/feet conditions, showing an increase in Tfing. There was a significant increase in blood perfusion in the fingers at stage 3 in all conditions. Subjective perception of hand warmth, and overall physical comfort level significantly increased in the stage 3 upper torso/arm/head condition. The findings indicate that physiological methods to enhance heat transfer by the blood to the periphery within protective clothing provide an additional tool for increasing total and local human comfort in extreme environments.
DOI：
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发表时间：
1989
期刊：
Aviation, space, and environmental medicine
影响因子：
--
作者：
Hoffman,RG;Pozos,RS
通讯作者：
Pozos,RS