Comparison of pulmonary ventilation parameters in performing HP and L-1 anti-G maneuvers
10.3760/cma.j.issn.1007-6239.2014.01.008
- VernacularTitle:做HP和L-1抗荷动作时的肺通气参数比较
- Author:
Rong LIN
1
;
Sanyuan WU
;
Weiru SHI
;
Yi WANG
;
Lihua LI
;
Sha SHA
;
Zhao JIN
Author Information
1. 空军航空医学研究所,北京,100142
- Publication Type:Journal Article
- Keywords:
Pulmonary ventilation;
Maximal voluntary ventilation;
Peak expiratory flow rate;
Inspiratory capacity;
Anti-G maneuver
- From:
Chinese Journal of Aerospace Medicine
2014;25(1):31-35
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the pulmonary ventilation characters of performing HP and L 1 anti-G maneuvers,to determine the flow requirement for oxygen system design,and to provide references to the pilot anti-G straining maneuver training and physiological requirements for oxygen system development.Methods Ten male subjects were trained on ground by HP and L-1 maneuvers and the pulmonary ventilation parameters were recorded as follows:respiratory frequency,expiratory volume,inspiratory volume,peak expiratory flow rate (PEFR),peak inspiratory flow rate (PIFR),and maximal voluntary ventilation (MVV).Results The respiratory frequency,expiratory volume,PEFR and MVV of performing HP maneuver were higher than those of performing L-1 maneuvers (P＜0.01).The differences of inspiratory volume and PIFR between performing L-1 and HP maneuver were not significantly (P ＞ 0.05).Without the oxygen-mask wearing,the PIFR of performing HP and L-1 maneuvers was (300.31 ± 72.08) L/min and (281.00 ± 86.56) L/min respectively.Conclusions The demands of performing HP and L-1 maneuvers to the peak flow of oxygen system are almost same because of the similar characters in inspiration period.The faster respiratory rate of performing HP maneuver indicates that the pilots should be guided to keep the right frequency during +Gz exposure.In order to completely meet the needs of respiratory demands of performing HP and L-1 maneuvers,the peak flow of oxygen system should be more than 300 L/min.The variation of pulmonary ventilation parameters when performing the maneuvers together with mask oxygen supply needs further investigation.
