在健康的空军飞行员中,高G耐受性和心肺储备功能
Aerospace medicine and human performance
|January 4, 2024
概括
战斗机飞行员在1秒/强迫生命能力比率下强制呼吸量较低,可能更容易发生重力诱导的意识丧失 (G-LOC). 通过CPET评估的心肺储备功能,在体验G-LOC/A-LOC和没有体验G-LOC/A-LOC的组之间没有显著差异.
科学领域:
- 航空航天医学 航空航天医学
- 心肺生理学 心肺生理学
- 航空中的人类因素
背景情况:
- 心肺储备功能 (CPRF) 对战斗机飞行员的G耐受性至关重要.
- 现有的研究缺乏关于CPRF对重力诱导的失去意识 (G-LOC) 或几乎失去意识 (A-LOC) 的影响的共识.
- 心肺运动测试 (CPET) 提供了一种评估飞行员中CPRF的方法.
研究的目的:
- 调查CPET衍生的心肺储备功能与战斗机飞行员G-LOC/A-LOC的发生之间的关系.
- 为了比较在离心机测试期间经历G-LOC/A-LOC和没有经历G-LOC/A-LOC的飞行员之间的CPET参数.
- 为了确定影响高性能飞机G耐受性的潜在生理因素.
主要方法:
- 一群264名男性战斗机飞行员,飞行时间超过500小时,接受了CPET和人类离心机测试.
- 飞行员被分为两组:那些经历G-LOC/A-LOC的人和那些没有经历G-LOC/A-LOC的人,根据离心机结果.
- 统计分析了CPET参数,并在G-LOC/A-LOC和非G-LOC/A-LOC组之间进行了比较.
主要成果:
- 在264名飞行员中,有37人 (14%) 经历过G-LOC/A-LOC.
- 在人口统计学因素 (年龄,身高,体重,BMI) 中,两组之间没有发现显著差异.
- 与非G-LOC/A-LOC组相比,G-LOC/A-LOC组的强迫生命能力 (FVC) 和1秒/强迫生命能力 (FEV1/FVC) 的强迫呼气量显著降低.
结论:
- FEV1/FVC比率可能是导致战斗机飞行员G-LOC/A-LOC易受性的因素.
- 低FEV1/FVC表示的通风减少的飞行员可能面临更高的G-LOC/A-LOC风险.
- 关键的CPET参数,如氧气摄入量和运动血压,似乎不是G-LOC/A-LOC的主要决定因素.
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