摘要
报告一种自制的功能麻醉环路，其结构特点为将呼气瓣移至呼气管的近心端，瓣后有一排气孔，通过关闭和开放该孔而改变环路功能。打开排气孔，具有Ｂａｉｎ环路功能；关闭排气孔，可与普通麻醉机连接构成紧闭环路。１７８例临床应用中，行半开放通气７３例，其重吸入ＣＯ２浓度（ＰｉｎＣＯ２）为０．２±０．２ｋＰａ，表明其半开放通气功能可靠；行紧闭循环通气１０５例，其ＶＴ、ＶＥ、ＰＥＴＣＯ２、ＰｉｎＣＯ２和Ｐａｗ的均值与多种国产和进口麻醉机比较差异无显著性意义（Ｐ＞０．０５），证明其紧闭通气性能良好。
?We designed an multifunctional anesthesia circuit, in which expiration valve was in the paracentral end of the exhaust pipe with a relief pore. The function of the ciucuit was changed by closing or opening the relief pore. When the pore is opened, the circuit has the function of Bain circuit. When the pore is closed, it can be connected to a common anesthesia machine as closed circuit. In clinical application of 178 cases, it was used as semiopened circuit in 73 cases, and reinhaled CO_2 concentration(PinCO_2) was 0.2±0.2 kPa, showing that its semiopened circuit function is reliable. It was used as closed circuit in 105 cases and compared with several types of anesthesia machine closed circuit; No significant difference was observed among parameters such as VT、VE、PETCO_2,Paw,PinCO_2,indicating that its closed circuit function is also good.
