ISSN 2398-2969      

Anesthetic circuits: overview

Clapis

Introduction

  • Anesthetic circuits are a means of delivering fresh gas and removing expired gas.
  • The 3 objectives of an anesthetic circuit are:
    • Easy to breath in.
    • Easy to breath out.
    • No rebreathing of carbon dioxide (CO2).
  • Non-rebreathing or open anesthetic circuits are used in rabbits and other small mammals as these patients don’t weigh enough to move air through a rebreathing circuit.

Basic principles

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Ayre's T-piece

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Bain

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Humphrey ADE

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T-piece vs Bain

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Manual IPPV with open circuits (T-piece and Bain)

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Safety considerations for non-rebreathing circuits

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Advantages and disadvantages

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Kaul T K & Mittal G (2013) Mapleson’s breathing systems. Indian J Anaesthesia 57 (5), 507-515 PubMed.
  • Wenger S (2012) Anesthesia and analgesia in rabbits and rodents. J Exotic Pet Med 21 (1), 7-16 VetMedResource.

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