Twigley A, Chakrabarti M K, Whitwam J G
Anaesthesia. 1987 Apr;42(4):419-24. doi: 10.1111/j.1365-2044.1987.tb03986.x.
A new electronic ventilator for application during closed breathing system anaesthesia is described (OAV7700, Ohmeda). It is easy to use and can be mounted on any conventional anaesthetic machine. It has several desirable features, such as a simple control and display panel, appropriate alarms and a patient breathing system that can be autoclaved. Observations were made on seven patients undergoing major surgery. Anaesthetic gases were introduced at 1, 2 and 4 litres/minute at three points in the breathing system, one conventionally in the closed system, one at the ventilator and one in the tracheal tube. Carbon dioxide homeostasis was maintained during this procedure. The application of fresh gas flows of 2 and 4 litres/minute in the tracheal tube allowed a small but significant reduction in the mean tidal volume. However, it was concluded that a fresh gas flow of 1 litre/minute applied conventionally either into the closed system or at the ventilator, provided optimal conditions.
本文介绍了一种新型电子呼吸机，适用于闭式呼吸系统麻醉（Ohmeda公司的OAV7700型）。它使用简便，可安装在任何传统麻醉机上。它具有几个理想的特性，比如控制和显示面板简单、配备适当的警报装置以及可进行高压灭菌的患者呼吸系统。对7例接受大手术的患者进行了观察。在呼吸系统的三个点以每分钟1升、2升和4升的流量引入麻醉气体，一个点按传统方式在闭式系统中，一个点在呼吸机处，一个点在气管导管中。在此过程中维持了二氧化碳稳态。在气管导管中以每分钟2升和4升的流量输送新鲜气体，可使平均潮气量有小幅但显著的减少。然而，得出的结论是，按传统方式在闭式系统中或在呼吸机处以每分钟1升的流量输送新鲜气体，可提供最佳条件。
