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对象与方法从初上高原执行任务的25名装甲驾驶员和75名勤务人员中各随机抽样选出5名做为观察组及对照组,两组平均年齡分别为24岁和25岁。应用RDH-2000型O_2及CO_2分析器测定呼出气氧、二氧化碳分压.以测试人员在海拔2700m地区休息1周后测得的数据为基础,观察组驾驶坦克,对照组乘面包车行军,当到达海拔3300m及4700m,立即分别测定上述指标。结果在海拔2700m地区,观察组及对照组O_2分压均数均为14.72kPa,CO_2分压平均为6.09kPa和5.73kPa,两组无显著差异(P>0.05);海拔3300m时,观察组和对照组呼出气O_2分压分别为13.18±0.52kPa和14.78±0.52kPa,观察组明显低于对照组(P<0.01),而CO_2分压二者分别为7.17±1.15kPa和5.65±0.69kPa,观察组明显高于对
Subjects and methods Five randomly selected from 25 armored pilots and 75 servicemen who performed tasks in the early morning plateau were selected as the observation group and the control group. The average age of the two groups was 24 and 25 respectively. Oxygen and carbon dioxide partial pressure were measured by O_2 and CO_2 analyzers on RDH-2000. Based on the data measured after 1 week rest at the altitude of 2700m in the observation group, the observation group was driven by a tank while the control group was marched by a van. 3300m above sea level and 4700m, immediately measured the above indicators. Results In 2700m above sea level, the average partial pressure of O_2 was 14.72kPa in observation group and control group, the average partial pressure of CO_2 was 6.09kPa and 5.73kPa respectively, with no significant difference between the two groups (P> 0.05) In the control group, the partial pressure of O 2 was 13.18 ± 0.52 kPa and 14.78 ± 0.52 kPa, respectively, and the observation group was significantly lower than that of the control group (P <0.01). The CO 2 partial pressures were 7.17 ± 1.15 kPa and 5.65 ± 0.69 kPa, The observation group was significantly higher than the right