Out-of-Circuit Vaporizers

  • Peter Schreiber
Part of the Anaesthesiology and Resuscitation / Anaesthesiologie und Wiederbelebung / Anaesthésiologie et Réanimation book series (A+I, volume 59)


The purpose of a vaporizer is to enrich the gas or gas mixture being delivered by an anaesthesia machine with the vapor of a liquid anaesthetic agent. Basically, there are two possible locations for a vaporizer on an anaesthesia apparatus. The vaporizer may be inserted into the fresh gas line which supplies the anaesthesia breathing system with the gas or gas mixture (out-of-circuit); or the vaporizer may be inserted into the breathing system itself (in-circuit). The following chapter is concerned primarily with the former arrangement. We will refer to the concentration of the vapor of the liquid anaesthetic agent in the gas as “the concentration delivered by the vaporizer” or, simply, “the concentration”. For convenience, the commonly used anaesthetic agents are listed with their physical properties in Fig. 29.


Anaesthetic Agent Barometric Pressure Output Performance Throttle Valve Vaporizer Chamber 
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Copyright information

© Springer-Verlag Berlin · Heidelberg 1972

Authors and Affiliations

  • Peter Schreiber
    • 1
  1. 1.Department of AnesthesiologyUniversity of AlabamaBirminghamUSA

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