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Canadian Journal of Anesthesia, Vol 22, 696-702, Copyright © 1975 by Canadian Anesthesiologists' Society

Effect of Isoflurane Anaesthesia and Surgery on Carbohydrate Metabolism and Plasma Cortisol Levels in Man

TSUTOMU OYAMA 1, PETER LATTO 1, and DUNCAN A. HOLADAY 1

1 Department of Anesthesiology, University of Miami School of Medicine and the Veterans Administration Hospital, Miami, Florida

The present study was undertaken to investigate in nine male surgical patients the effects of isoflurane anaesthesia alone on the carbohydrate metabolism by determining plasma growth hormone (GH), insulin, blood glucose, and cortisol, and to compare them with the effects of anaesthesia associated with surgical operations. Determination of plasma GH, insulin, cortisol, and blood glucose were made simultaneously before induction of isoflurane anaesthesia, after maintenance of anaesthesia for 15 minutes and 30 minutes and during and after conclusion of the operation.

Plasma GH concentrations showed a significant elevation during isoflurane anaesthesia, and maintained a similar high level one hour after the start of the operation. An insignificant elevation in plasma insulin level and significant increases in blood glucose were noted during anaesthesia and operation. Plasma cortisol levels increased insignificantly during anaesthesia, but increased markedly during operation. Our observations would suggest that the increased blood level of GH and elevated blood cortisol play a part in the increase of blood glucose during isoflurane anaesthesia and surgical operations in man.






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Copyright © 1975 by the Canadian Anesthesiologists' Society.