Rice G Merrill, Snider Dallas, Moore Jeffrey L, Lavan J Timothy, Folga Rich, VanBrunt Thomas B
Naval Aerospace Medicine Institute, NAS Penscola, Pensacola, FL., USA.
Aerosp Med Hum Perform. 2016 Dec 1;87(12):996-1003. doi: 10.3357/AMHP.4609.2016.
Few studies have evaluated physiological responses to high acceleration forces during actual flight and to our knowledge no normative data has been acquired by technologies such as wearable biosensors during high performance jet aircraft operations.
In-flight physiological data from an FDA cleared portable triaxial accelerometer and bio-sensor were observed from five active duty F-18 pilots of the Naval Flight Demonstration Squadron (Blue Angels). Of the five pilots, three were formation pilots who flew lower G profiles and two were solo pilots who flew higher G profiles. Physiological parameters monitored were heart rate, respiratory rate, temperature, caloric expenditure, and duration of exposure to levels of acceleration.
Evaluated were 25 practice demonstration flights; 9 flights were excluded secondary to incomplete or inaccurate physiological data. We observed no significant bradycardia during a total of 189 maneuvers which met inclusion criteria for push-pull events (PPE) or isolated -Gz exposures. Further analysis of 73 PPE revealed an overall significant rise in HR following the PPE, where mean heart rate was 106 (95% CI, 100:112) at the beginning of the push and 129 (95% CI, 123:135) following the pull.
A majority of the flights monitored provided reliable physiological data. Initial data suggests, contrary to currently held aeromedical doctrine, maneuvers such as the "push-pull" do not evoke vasovagal based bradycardic responses in aerobatic pilots. Possible explanations for these findings are sympathetic nervous system activation through adaptation and/or sustained isometric resistance from control inputs, both of which are areas of future research for our team.Rice GM, Snider D, Moore JL, Lavan JT, Folga R, VanBrunt TB. Evidence for -Gz adaptation observed with wearable biosensors during high performance jet flight. Aerosp Med Hum Perform. 2016; 87(12):996-1003.
很少有研究评估实际飞行过程中对高加速力的生理反应，据我们所知，在高性能喷气式飞机操作期间，尚未通过可穿戴生物传感器等技术获取标准数据。
从海军飞行示范中队（蓝天使）的五名现役F - 18飞行员那里观察了来自美国食品药品监督管理局批准的便携式三轴加速度计和生物传感器的飞行中的生理数据。在这五名飞行员中，三名是编队飞行员，飞行较低的过载剖面，两名是单机飞行员，飞行较高的过载剖面。监测的生理参数包括心率、呼吸频率、体温、热量消耗以及暴露于不同加速度水平的持续时间。
评估了25次练习示范飞行；9次飞行因生理数据不完整或不准确而被排除。在总共189次符合推挽事件（PPE）或孤立 - Gz暴露纳入标准的机动动作中，我们未观察到明显的心动过缓。对73次PPE的进一步分析显示，PPE后心率总体显著上升，推挽开始时平均心率为106（95%置信区间，100:112），拉回后为129（95%置信区间，123:135）。
大多数监测飞行提供了可靠的生理数据。初步数据表明，与目前的航空医学理论相反，诸如“推挽”等机动动作在特技飞行飞行员中不会引发基于迷走神经的心动过缓反应。这些发现的可能解释是通过适应引起的交感神经系统激活和/或来自控制输入的持续等长阻力，这两者都是我们团队未来研究的领域。
赖斯GM，斯奈德D，摩尔JL，拉万JT，福尔加R，范布伦特TB。高性能喷气式飞行期间使用可穿戴生物传感器观察到的 - Gz适应证据。航空航天医学与人类表现。2016；87(12):996 - 1003。
