Gowrie-Mohan S, Chakrabarti M K, Lockwood G G
Department of Anaesthesia, Hammersmith Hospital, London.
Anaesthesia. 1995 Aug;50(8):706-8. doi: 10.1111/j.1365-2044.1995.tb06099.x.
We have examined the predictability of inspired isoflurane concentration during low-flow anaesthesia using a to-and-fro breathing system. Twenty one adult patients requiring mechanical ventilation of the lungs during surgery took part in this study. Using a fresh gas flow of 2 l.min-1, the ratio of inspired isoflurane concentration to isoflurane vaporizer setting was found to be approximately 4/5th after 5 min of anaesthesia. The ratio was maintained throughout the procedure, except for a few minutes following each change in vaporizer setting.
我们使用来回式呼吸系统研究了低流量麻醉期间吸入异氟烷浓度的可预测性。21例手术期间需要进行肺机械通气的成年患者参与了本研究。在新鲜气流为2升/分钟的情况下，麻醉5分钟后，吸入异氟烷浓度与异氟烷蒸发器设定值的比率约为4/5。除了每次蒸发器设定值改变后的几分钟外，该比率在整个过程中保持不变。
