Hahn C E, Palayiwa E, Sugg B R, Lindsay-Scott D
Br J Anaesth. 1986 Oct;58(10):1161-6. doi: 10.1093/bja/58.10.1161.
A microprocessor-controlled anaesthetic vaporizer is described. Fresh gas is mixed in the correct proportions using two pulsed solenoid valves and a proportion of this passes through a third pulsed solenoid valve and is bubbled through liquid halothane. The temperature of the liquid agent is measured and the pulse frequency is modified to give the correct vapour concentration for the set flow rate and measured temperature. Initially, the vapour was produced by bubbling fresh gas through the agent in a conventional halothane bottle. However, because of the large liquid volume available, nitrous oxide was found to dissolve in large quantities in the halothane. A small volume vaporizer which was continually replenished from a reservoir was designed. Measurements of the vapour concentrations emerging from such a vaporizer were made and were found to agree with the set values +/- 0.1% v/v.
描述了一种微处理器控制的麻醉蒸发器。使用两个脉冲电磁阀将新鲜气体按正确比例混合，其中一部分气体通过第三个脉冲电磁阀，并鼓泡通过液态氟烷。测量液体药剂的温度，并修改脉冲频率，以针对设定的流速和测量的温度给出正确的蒸汽浓度。最初，蒸汽是通过在传统氟烷瓶中使新鲜气体鼓泡通过药剂产生的。然而，由于有大量的液体，发现氧化亚氮大量溶解在氟烷中。设计了一种从储液器持续补充的小容量蒸发器。对这种蒸发器产生的蒸汽浓度进行了测量，发现与设定值的偏差在±0.1%（v/v）以内。
