改装体检直升机飞行员前庭自主神经反应观察

Vestibular autonomic reactions in pilots of modified helicopters detected at physical examination

目的观察改装体检直升机飞行员的前庭自主神经反应。方法对35名参加改装体检直升机的飞行员行平静状态胃电图(EGG)记录,然后于电动转椅上进行科里奥利(Coriolis)加速度试验,待出现明显恶心反应时停止刺激,再次描记EGG,统计Coriolis加速度刺激前后EGG各指标变化,并将前庭自主神经反应分度与既往观察的歼击机飞行员前庭自主神经反应分度进行对照。结果 1)直升机飞行员Coriolis加速度刺激后4min的EGG平均幅值(327.1μV)、平均节律紊乱百分比(28.6%)、正常慢波百分比(38.9%)与平静状态4min的EGG平均幅值(259.7μV)、平均节律紊乱百分比(24.2%)、正常慢波百分比(47.8%)差异有统计学意义(P<0.01);但前庭刺激前后的EGG平均频率无明显差异。2)刺激后直升机飞行员前庭自主神经反应Ⅱ°者占31.4%(11/35),与既往歼击机飞行员刺激后前庭自主神经反应Ⅱ°者占28.0%(7/25)相比无明显差异。结论 Coriolis加速度刺激下EGG平均幅值、平均节律紊乱百分比、正常慢波百分比可作为前庭自主神经反应的评价指标,改装体检直升机飞行员的前庭自主神经功能状况良好。

Objective To observe the vestibular autonomic reactions in pilots of modified helicopters detected at physical examination.Methods Electrogastrograms（EGG） of 35 pilots of modified helicopters in normal state were recorded.Coriolis acceleration test was performed in the pilots on electric rotatory chair and stopped when nausea occurred.Then changes in their EGG before and after Coriolis acceleration test were recorded and the degrees of their vestibular autonomic reactions were compared with the reported findings in fighter pilots.Results The average amplitude,average rhythm disturbance,and normal slow wave of EGG for 4min were significantly lower in pilots of helicopters before Coriolis acceleration test than in pilots of fighters after Coriolis acceleration test（259.7μV vs 327.1μV,24.2% vs 28.6%,47.8% vs 38.9%,P〈0.01）.However,no significant difference was found in the average frequency of EGG and in the II° vestibular autonomic reactions between pilots of modified helicopters and fighters before and after Coriolis acceleration test [31.4%（11/35） vs 28.0%（7/25）].Conclusion The average amplitude,average rhythm disturbance,and normal slow wave after Coriolis acceleration test can be used as the indications of vestibular autonomic reactions in pilots of modified helicopters at physical examination.