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Effect of inhalation anaesthetics on total respiratory resistance in conscious ponies
Author(s) -
HALL L. W.,
YOUNG S. S.
Publication year - 1992
Publication title -
journal of veterinary pharmacology and therapeutics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.527
H-Index - 60
eISSN - 1365-2885
pISSN - 0140-7783
DOI - 10.1111/j.1365-2885.1992.tb01004.x
Subject(s) - enflurane , halothane , isoflurane , anesthesia , inhalation , respiratory system , medicine , chemistry
Total respiratory resistance was measured rapidly and non‐invasively in 6 conscious ponies before and after they inhaled approximately 25% of the minimal anaesthetic concentration (0.25 MAC) of either enflurane, halothane, or isoflurane, over a 10 min period. The forced random noise (FRN) method was used to measure the impedance over the frequency range of 5 to 40 Hz and its real part, the resistance, was extracted from these impedance measurements. At the concentrations used, halothane appeared to have no effect on the total respiratory resistance; enflurane and isoflurane seemed to increase it but the changes were not statistically significant.