摘要
目的:探讨吸入液氧对高原人体运动心力储备的影响。方法:在海拔3700m和5400m高原,分别对10名健康青年携1.5m3单兵液氧灌吸氧(吸氧组,4L/min)速跑,其中海拔3700m进行400m和1600m,海拔5400m进行200m,并与携罐不吸氧(常氧组)时比较。速跑前后采用心力监护仪采集和记录心动周期和心力信息,把完成规定运动量运动后第一心音(S1)幅值对安静时S1幅值增加的相应倍数评估心肌收缩能力储备指数(CCRI);利用舒张期和收缩期时限数据计算舒张期/收缩期比值(D/S比)。结果:速跑运动后较运动前HR、S1均增高,差别有非常显著性(P<0.01);常氧组D/S增高,差别有显著性(P<0.05)。吸氧组运动后较常氧组CCRI、S1增高,差别有显著性(P<0.05或P<0.01)。结论:高原低氧环境下运动机体心脏储备主要是心肌收缩能力储备而不是心率储备。吸入液氧可增强机体心力储备能力,为进入高原途中卫勤保障及高原边防巡逻等带来有利的安全保障。
Objective： To observe the effects of Inhaling Liquid - oxygen on exercising cardiac reserve at high altitude. Methods： 20 healthy youths, who bring a single liquid- oxygen （1.5m^3） bottle, were assigned in the inhaling oxygen group （n = 10, liquid oxygen 4L/min） and normal oxygen group （n = 10） ; all subjects taken play to 400m and 1600m fast mn at 3700m altitude and 200m fast mn at 5400m altitude. We collected and recorded the cardiac cycle and cardiac contractility using the cardiac contractility monitor before and after fast run. The cardiac constricting reserve index （CCRI） and diastolic phase/systolic phase （D/S） were evaluated. Results： HR and S1 increased significantly after fast ran, compared with that before mn（ P 〈 0.01 ）. D/S increased significantly in normal oxygen group （P 〈 0.05 ）. CCRI and S1 increased significantly in Inhaling Liquid- oxygen group compared with normal group （P 〈0.05 or P 〈0.01）. Conclusions： The cardiac reserve at high altitude corrected mainly with the cardiac contractility reserve rather than heart rate reserve. Liquid - oxygen Inhalation can increase human cardiac reserve and it is sanitation service safeguard during marching to high altitude and high altitude patrol.
出处
《高原医学杂志》
CAS
2005年第4期11-14,共4页
Journal of High Altitude Medicine
基金
军队科研基金课题(04Z002)
关键词
高原
运动
液态氧
单兵供氧
心力储备
心率
High altitude
Exercise
Liquid - oxygen
Cardiac reserve
Heart rate
