Changes in related heart rate variability indicators and vital signs of aviators flying 3 different types of aircraft at a simulated altitude of 7 500 meters
10.3760/cma.j.issn.1009-6906.2016.06.004
- VernacularTitle:模拟7500m高空缺氧环境下三种机型飞行员心率变异性相关指示及生命指征变化
- Author:
Xiaolong LI
1
;
Donghai ZHANG
1
;
Farui BAI
1
;
Lianfang WANG
1
;
Yanzhi LI
1
Author Information
1. 解放军桂林疗养院航空生理心理训练科,广西壮族自治区桂林,541003
- Publication Type:Journal Article
- Keywords:
Aviator;
Hypoxia;
Vital signs;
Heart rate variability
- From:
Chinese journal of nautical medicine and hyperbaric medicine
2016;23(6):432-436
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effects of simulated 7 500 high altitude on the changes of such related indicators as heart rate variability (HRV),heart rate (HR),respiratory rate,body surface temperatures (BST),arterial oxygen saturation (SaO2) and blood pressure (BP) of the aviators flying 3 different types of aircraft.Methods Forty-nine aviators were chosen as research subjects,and were divided into 3 groups in accordance with the different types of aircraft they flew.Changes in HRV and other vital signs were observed in the aviators flying 3 different types of aircraft.Results As compared with that before hypoxia exposure,HR and BST of the aviators flying different types of aircraft were significantly increased,3 minutes after exposure to hypoxia (P ＜ 0.01),while SaO2 was significantly decreased (all P ＜ 0.01),and respiratory frequency was also decreased (P ＞ 0.05).Before exposure,the values of low frequency (LF),high frequency (HF) and total power (TP) of the aviators flying bombers were all obviously higher than those after exposure (P ＜ 0.05).The LF value before hypoxia was significantly higher than that of the aviators flying transports (P ＜ 0.05).Both before and after hypoxia,body surface temperature of the aviators flying fighters [(32.05 ± 1.16) 、(32.69 ±0.87)℃] was all significantly higher than that of the aviators flying bombers [(30.45 ± 2.13)、(31.76 ± 1.05) ℃] (P ＜ 0.05).Following exposure to hypoxia,the maximum A and minimum mean HRB difference of the aviators flying fighters was significantly higher than that before hypoxia exposure (P ＜ 0.01).Following exposure to hypoxia,the maximum mean respiratory rate of the aviators flying fighters was obviously decreased (P ＜ 0.05),and the maximum and minimum mean respiratory rate difference of the aviators was significantly lower than that before hypoxia exposure (P ＜ 0.05).Conclusions Following hypoxia for 3 minutes at a simulated altitude of 7 500 meters,HR and BST of the aviators in the 3 groups were all increased,SaO2 and respiratory rate were decreased,but BP was not significantly increased.There were variable differences in vital signs and HRV for the aviators flying different types of aircraft.
