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Canadian Journal of Anesthesia, Vol 31, 687-689, Copyright © 1984 by Canadian Anesthesiologists' Society
1 Department of Anaesthesia, The Hospital for Sick Children, Toronto, Ontario
Address correspondence to: Dr. J. Lerman, Dept. of Anaesthesia, The Hospital for Sick Children, 555 University Avenue, Toronto, Ont. M5G 1X8.
A case report describing the failure of a Fluotec Mark II vapourizer to deliver the indicated anaesthetic concentration during surgery is presented. The failure was caused by a broken internal circlip which resulted in most of the fresh gas flow bypassing the vapourizer. The inspired halothane concentration was reduced to 0.1 per cent, irrespective of the vapourizer dial setting. This type of vapourizer failure may be identified by the unusually loose dial on the Mark II vapourizer. The complications resulting from a light level of anaesthesia include awareness, systolic and diastolic hypertension, movement, and their sequelae.
Key Words: EQUIPMENT: vapourizer failure COMPLICATIONS: awareness
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