The minimum reservoir capacity necessary to avoid air-dilution. An experimental model of spontaneous breathing through a T-piece.

Abstract:

:The fresh gas flow rate necessary to prevent rebreathing in T-piece anaesthesia is well established at twice total ventilation. The minimum reservoir volume to avoid air dilution of anaesthetic gases in the alveolus at this flow rate is, however, undecided. A lung model was constructed to represent spontaneous respiration, and the value of minimum reservoir volume as a proportion of tidal volume determined experimentally. The values so obtained were in close accord with those calculated theoretically. Extension of the theoretical analysis leads to a recommendation that a reservoir volume one-third that of tidal volume, as originally suggested by Ayre in 1956, will prevent air-dilution.

journal_name

Br J Anaesth

authors

Naunton A

doi

10.1093/bja/57.8.803

subject

Has Abstract

pub_date

1985-08-01 00:00:00

pages

803-6

issue

8

eissn

0007-0912

issn

1471-6771

pii

S0007-0912(17)41352-3

journal_volume

57

pub_type

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