Aasmoe L, Olsen O H
Klinisk farmakologisk avdeling, Regionsykehuset i Tromsø.
Tidsskr Nor Laegeforen. 1995 Sep 10;115(21):2652-5.
In recent years there has been a growing awareness of possible hazards caused by anaesthetic gases in operating theatres. Our study monitored ambient nitrous oxide (N2O) levels in the operating theatres and recovery rooms at the University Hospital in Tromsø. The results show that exposure to waste anaesthetic gases occurs because of leaks in the anaesthetic equipment. The three major sources of leaks are masks, high pressure fittings and exhalation valves. Prevention of leakage from equipment is very important, and a leakage testing programme should be an essential part of the daily control strategy. Good working practices and tracheal intubation results in low exposure to nitrous oxide in the breathing zone of the anesthetic personnel. During mask anaesthesia we have observed nitrous oxide concentrations above 1500 ppm, owing to mask leakage. A closely fitting scavenging mask and good working practices lead to in lower nitrous oxide concentrations. Nitrous oxide exhalation from the patient in the recovery room is only a minor problem.
近年来，人们越来越意识到手术室中麻醉气体可能造成的危害。我们的研究监测了特罗姆瑟大学医院手术室和恢复室中的环境氧化亚氮（N2O）水平。结果表明，由于麻醉设备泄漏，会发生废麻醉气体暴露。泄漏的三个主要来源是面罩、高压配件和呼气阀。防止设备泄漏非常重要，泄漏测试计划应成为日常控制策略的重要组成部分。良好的工作习惯和气管插管可使麻醉人员呼吸区域的氧化亚氮暴露量较低。在面罩麻醉期间，由于面罩泄漏，我们观察到氧化亚氮浓度超过1500 ppm。紧密贴合的清除面罩和良好的工作习惯会使氧化亚氮浓度降低。恢复室中患者呼出的氧化亚氮只是一个小问题。
