British Journal of Anaesthesia, Vol 83, Issue 2 210-216, Copyright © 1999 by The Board of Management and Trustees of the British Journal of Anaesthesia
J. J. Pandit, J. Manning-Fox, K. L. Dorrington and P. A. Robbins
We have determined the influence of 0.1 minimum alveolar concentration
(MAC) of sevoflurane on the acute ventilatory response to hypoxia (AHVR),
hypoxic ventilatory decline (HVD) and the magnitude of the rapid decline in
ventilation on relief of sustained hypoxia (the off- response) in eight
healthy adult volunteers. The following design was used with and without
0.1 MAC of sevoflurane: end-tidal PO2 was maintained at 13.3 kPa for 5 min,
at 7.9 kPa for 20 min and at 13.3 kPa for 5 min. End-tidal PCO2 was held
constant throughout at 1.3 kPa above the subject's normal value. A dynamic
end-tidal forcing system was used to generate these gas changes.
Sevoflurane reduced AHVR from 14.5 (SEM 1.2) to 11.6 (1.6) litre min-1, and
the off-response at cessation of hypoxia from 7.1 (1.1) to 6.3 (1.4) litre
min-1. The magnitude of HVD was slightly increased by sevoflurane from 8.2
(1.1) to 10.6 (2.8) litre min-1. None of these changes was significant
(ANOVA). These results suggest that 0.1 MAC of sevoflurane had very little
effect on the AHVR, and that it did not markedly alter the processes
underlying HVD during sustained hypoxia.
CLINICAL INVESTIGATIONS
Effects of subanaesthetic sevoflurane on ventilation. 2: Response to acute and sustained hypoxia in humans
Nuffield Department of Anaesthetics, John Radcliffe Hospital, Oxford OX3 9DU, UK; University Laboratory of Physiology, Parks Road, Oxford OX1 3PT, UK
![]()
CiteULike
Connotea
Del.icio.us What's this?
This article has been cited by other articles:
![]() |
J. J. Pandit and K. J. Buckler Differential effects of halothane and sevoflurane on hypoxia-induced intracellular calcium transients of neonatal rat carotid body type I cells Br. J. Anaesth., November 1, 2009; 103(5): 701 - 710. [Abstract] [Full Text] [PDF] |
||||
