A Closed Circuit

  • T. E. J. Healy
  • P. C. W. Beatty
  • B. Kay


The use of expensive anaesthetic agents and the need to reduce operating-theatre pollution has promoted the use of circuits which minimize gas usage. A closed circuit has been developed in the University of Manchester (Beatty et al. 1982). The circuit maintains a constant volume at end expiration. This is achieved by the opposing action of a spring mechanism attached to a bellows of low mass.


Nitrous Oxide Constant Volume Carbon Dioxide Absorption Close Circuit Force Spring 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. Beatty P, Wheeler MFS, Kay B, Greer W, Cohen AT, Parkhouse J (1982) A versatile closed circuit. Br J Anaesth 54:689PubMedCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin, Heidelberg 1985

Authors and Affiliations

  • T. E. J. Healy
  • P. C. W. Beatty
  • B. Kay

There are no affiliations available

Personalised recommendations