“D 环”：贝恩回路的闭路运行。

The "D circle": closed-circuit operation of the Bain circuit.

作者信息

Sasse F J, Flemming D C, Hoff B, Smith N T, Rampil I J

出版信息

Can Anaesth Soc J. 1979 Sep;26(5):420-3. doi: 10.1007/BF03006458.

Abstract

A method of converting a Mapleson D (Bain) circuit to closed-circuit operation is presented, utilizing a laboratory air pump and a Waters carbon dioxide absorber canister to recirculate exhaled gas. The elimination of carbon dioxide from the circuit was studied and found to be adequate. The circuit would allow the use of low fresh gas flows for the maintenance of anaesthesia without the danger of carbon dioxide rebreathing. We suggest that such a circuit could provide appropriate conditions of gas humidity and temperature for endotracheal anaesthesia, while realizing the advantage of a circulator in mask anaesthesia is possible. Further design considerations for a "D circle" breathing system for clinical use are discussed.

摘要

介绍了一种将Mapleson D（贝恩）回路转换为闭路运行的方法，该方法利用实验室空气泵和沃特斯二氧化碳吸收罐使呼出气体再循环。对回路中二氧化碳的清除进行了研究，发现清除效果良好。该回路可使用低新鲜气体流量维持麻醉，而无二氧化碳重复吸入的危险。我们认为，这样的回路可为气管内麻醉提供合适的气体湿度和温度条件，同时有可能实现面罩麻醉中循环器的优势。还讨论了临床使用的“D型环路”呼吸系统的进一步设计考虑因素。