Bain J A, Dick W, Englesson S, Glover J, Pollard B, Thompson W, Youngberg J A, Spoerel W E
Eur J Anaesthesiol. 1984 Mar;1(1):37-43.
A review of publications from various countries, using the Bain system with a fresh gas flow of 70 ml kg-1 min-1 and controlled ventilation, show a range of mean PaCO2 values between 36 and 43 mmHg. It was suggested that these differences could be related to the geographic location of the patient population studied. Anaesthetists from seven institutions in West Germany, England, Sweden, the United States, Australia and Canada collaborated in a preliminary study designed to find out whether these differences could be reduplicated. In 142 patients under a standard anaesthesia with controlled ventilation, PaCO2 values were determined 30 min after the fresh gas flows had been set. For 70 ml kg-1 min-1 the mean PaCO2 values ranged from 33 to 40 mmHg; for 100 ml kg-1 min-1 from 28 to 35 mmHg. Compared to the mean PaCO2 values from Canada, the results from Australia and the USA were not different and all at the lower end of this range; Sweden, West Germany and England reported significantly higher PaCO2 values. In the absence of any other obvious explanation, we suggest that patients in England and Northern Europe could have a higher CO2 output under anaesthesia than North American or Australian patients.
对来自不同国家的出版物进行回顾，这些研究使用贝恩系统，新鲜气流为70毫升/千克·分钟，采用控制通气，结果显示平均动脉血二氧化碳分压（PaCO2）值范围在36至43毫米汞柱之间。有人认为这些差异可能与所研究患者群体的地理位置有关。来自西德、英国、瑞典、美国、澳大利亚和加拿大七个机构的麻醉师合作开展了一项初步研究，旨在查明这些差异是否可以重现。在142例接受标准麻醉并采用控制通气的患者中，在设定新鲜气流30分钟后测定PaCO2值。对于70毫升/千克·分钟，平均PaCO2值范围为33至40毫米汞柱；对于100毫升/千克·分钟，范围为28至35毫米汞柱。与加拿大的平均PaCO2值相比，澳大利亚和美国的结果没有差异，且均处于该范围的下限；瑞典、西德和英国报告的PaCO2值明显更高。在没有任何其他明显解释的情况下，我们认为英国和北欧的患者在麻醉状态下的二氧化碳产量可能高于北美或澳大利亚的患者。
