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The estimation of inspired desflurane concentration in a low‐flow system
Author(s) -
GOWRIEMOHAN S.,
MURALITHARAN V.,
LOCKWOOD G. G.
Publication year - 1996
Publication title -
anaesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.839
H-Index - 117
eISSN - 1365-2044
pISSN - 0003-2409
DOI - 10.1111/j.1365-2044.1996.tb14953.x
Subject(s) - desflurane , vaporizer , fresh gas flow , medicine , anesthesia , propofol , ventilation (architecture) , sevoflurane , mechanical engineering , pathology , engineering
Summary We have examined the predictability of inspired desflurane concentration during low‐flow anaesthesia using a to‐and‐fro breathing system. Twenty‐two adult patients requiring mechanical ventilation of the lungs during surgery took part in the study. Using a fresh gas flow of 1 l.min 1 , the ratio of inspired desflurane concentration to desflurane vaporizer setting was found to be approximately 0.75 after 9 min of anaesthesia and at 2 l.min 1 fresh gas flow the ratio was approximately 0.9 after 2 min of anaesthesia. These ratios were maintained throughout the procedure, except for a few minutes following each change in vaporizer setting.