不同强度体力负荷下的平均呼吸流率曲线

Air Flow Measurements on 12 Young Men under Different Work Intensity

测定了12名健康男性青年在安静、250、500、750及1000kgm·min体力负荷下的呼吸气体流率变化,通过对其在不同情况下的流率曲线分别进行集总平均,给出了相应的平均呼吸气体流率,2倍标准差及平均流率变化率曲线。结果表明:(1)随着体力负荷的增强,平均呼吸气体流率曲线的吸气与呼气部分波幅明显增大,时间明显缩短,波形转变成近矩形波。安静时,V_(Imax)/V_I平均为3.27:1;1000kmg·min^(-1)体力负荷下为2.68:1;(2)安静时V_I、V_I_(max)、V_E_(max)及V_I_(max)较文献报道偏高;1000 kgm·min^(-1)体力负荷下,V_I_(max)及V_E_(max)较文献报道偏低。本结果可供制定我国呼吸防护装备生理学标准时参考。

The paper reports air flow measurements 12 young men at different work intensity. Simultaneous measurements of instantaneous inspiratory and expratory air flow were obtained from sedentary and under diffent working intensity 250,500 such as 750,1000 kgm·min 1. The experimental data were processed off-line by a micro- computer. On an average the air flow curves of 12 subjects at each work intensity, mean air flow curve and curve of rate of changes in air flow were plotted. The results show that (1) airflow curves obtained on human subjects at various work intensity vary in rate and amplitude with the work intensity (2) there are the differences of the parameteres of air flow curves between Chineses and foreigneres. However, the data contained in this report may be used in working out the physiological standard of respiratory protective equipment in our country and designing apparatus to simulate human respiration.