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人体在高温环境下,循环系统可产生一系列的生理适应性反应。列车车厢狭小,乘员多,炎热季节,可使车厢内环境具有高温特点。因此,研究高温环境中列车员的心输出量变化,对乘务劳动保护有一定的实际意义。1984年7月,我们曾用阻抗法观察了一组列车员在高温暴露下的心输出量变化。对象与方法一、对象常居兰州,为兰州列车段兰州至南京186/185次列车第7包乘组;共30名,男13名,女17名;年龄20～50岁,平均3l岁;乘务工龄0.5～9年者占51％,全部对象均经询问病史、综合检查排除心肺器质性病变。
The human body at high temperatures, the circulatory system can produce a series of physiological adaptive response. Trains narrow, more crew, hot season, indoor environment can have high temperature characteristics. Therefore, studying the change of cardiac output of conductor in high-temperature environment has some practical significance to the protection of crew labor. In July 1984, we observed the changes in cardiac output of a group of conductor exposed to high temperatures using the impedance method. Objects and methods First, the object often Lanzhou, Lanzhou to Lanzhou train to Nanjing 186/185 train by the seventh group; a total of 30, 13 men and 17 women, aged 20 to 50 years, an average of 3l years old; Crew length 0.5 to 9 years accounted for 51%, all subjects were asked history, comprehensive examination to rule out cardiovascular and cerebrovascular disease.