在长时间太空飞行后,心血管对站立有或没有下肢压缩服的反应
Stuart M C Lee1, Annelise Miller2, L Christine Ribeiro1
1KBR, Houston, TX.
概括
宇航员在漫长的太空任务后经历了心血管降温. 美国国家航空航天局NASA NASA
科学领域:
- 太空医学 太空医学
- 心血管生理学心血管生理学
- 人体生理学 人体生理学
背景情况:
- 长时间的太空飞行会导致心血管衰竭.
- 宇航员进行运动和液体负载以减轻这些影响.
- 静态不耐受是飞行后常见的问题.
研究的目的:
- 评估压缩服在缓解飞行后正静压力方面的有效性.
- 为了评估长时间太空飞行后静态反应的恢复时间表.
主要方法:
- 在飞行前和飞行后的多个点 (R+0到R+30天),对宇航员进行了静止测试 (倾向于站立).
- 测试包括没有压缩服和三种不同类型的条件:俄罗斯肯塔弗,NASA的梯度压缩服 (GCG) 和SpaceX的正静止保护服 (OPG).
- 测量了平均动脉压 (ΔMAP) 和心率 (ΔHR) 的变化.
主要成果:
- 在恢复日0 (R+0),穿着Kentavr服装的平均动脉压下降不那么显著,而不是没有服装.
- 站立时心率的增加在没有压缩服时更大,在佩戴Kentavr或OPG时更大,但不是GCG.
- 在没有压缩服的情况下,心率反应至少在两周内保持升高,而平均动脉压则恢复到飞行前的水平.
结论:
- 美国宇航局的渐变压缩服 (GCG) 有效地减轻了长时间太空飞行后站立时的心血管压力.
- 完全恢复静止对站立的反应,没有压缩服,需要几个星期.
- 压缩服在控制飞行后静态不耐受症方面发挥着至关重要的作用.
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