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The influence of changes in end-tidal carbon dioxide upon the Bispectral Index.
- Source :
-
Anaesthesia . May2008, Vol. 63 Issue 5, p458-462. 5p. 2 Graphs. - Publication Year :
- 2008
-
Abstract
- Carbon dioxide is known to affect consciousness in animals and humans. We surmised that changes in end-tidal carbon dioxide during anaesthesia might affect the Bispectral Index. Twenty-four patients due to undergo surgery were anaesthetised with fentanyl and a propofol infusion. The Bispectral Index, pulse rate and blood pressure were recorded while end-tidal carbon dioxide levels were changed. The patients acted as their own controls as they were subjected to high, normal and low levels of end-tidal carbon dioxide (3–12 kPa) according to a randomised sequence. There were no changes in the Bispectral Index or haemodynamic variables resulting from manipulation of the end-tidal carbon dioxide. At the level of hypnosis involved in this study, changes in end-tidal carbon dioxide, within the range tested, do not result in changes in the Bispectral Index. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00032409
- Volume :
- 63
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Anaesthesia
- Publication Type :
- Academic Journal
- Accession number :
- 31625159
- Full Text :
- https://doi.org/10.1111/j.1365-2044.2007.05399.x