增压辅助旅居人对高原的适应

在海拔4500m处,对26名18～43岁男性移居人进行了用增压车增压辅助对高原适应的研究。在增压30kPa时,心肺储备能力增强。除压速度>0.44m/s,会产生明显适应不良反应;除压速度<0.33m/s,不发生明显不适,并使增压过程中的心率减慢效应持续到除压后数小时。夜间睡眠增压,能消除睡眠中的潮式呼吸,改善若干高原适应不良症状。在33d内经18次断续增压处理的4名对象未损害正常的习服能力。结论:在4500m 高度用合理的增压,可辅助人体对高原的适应。

PRESSURIZATION ASSISTS THE ADAPTATION OF SOJOURNERS TO HIGH ALTITUDE

Twenty six sojourners were subjected to pressurization in a mobile compression chamber built as an ambulance at high altitude (4 500m) to study the effect of pressurization on the adaptation. When the chamber pressure was raised to a level which exceeded the outside atmospheric pressure by 30kPa, the cardiopulmonary reserve capacity was improved. When the depressuring rate was higher than 0.44m / s, the mountain sickness (MS) like reaction occurred. When the depressuring rate was lower than 0.33m/s, no symptoms were noticed and the existing low heart rate was maintained within several hours after the completion of depressurization. Some symptoms of MS or sleeping tidal breathing from which some of the subjects were suffering were alleviated or eliminated by pressurization in the night. In four subjects who experienced 18 times of pressurization during the period of 33 days of their sojourn at 4 500m, the capacity of acclimatization attained at the end of this period was not injured. The conclusion is that appropriate pressurization can assist the adaptation of sojourners to high altitude at 4 500m.