title: Flow reversal through a Mark III halothane vaporizer.
abstract: A fault in the assembly of a Matrix Large Animal Circle anaesthetic machine resulted in reversal of fresh gas flow through the vaporizer. The fault was discovered only after the sudden development of excessive depth of anaesthesia in two equine patients. Laboratory investigations were conducted to determine the effect of flow reversal on vaporizer output. Results indicated that output concentration was approximately doubled under these conditions.
authors.affiliation: Department of Anaesthesia, Royal Liverpool University Hospital.
authors.forename: A S
authors.initials: AS
authors.lastname: Gregg
authors.forename: R S
authors.initials: RS
authors.lastname: Jones
authors.forename: S L
authors.initials: SL
authors.lastname: Snowdon
mesh_terms: D000764:Anesthesia, Closed-Circuit / Q000295:instrumentation*; D000769:Anesthesia, Inhalation / Q000295:instrumentation*; D000818:Animals; D004868:Equipment Failure; D006221:Halothane; D006736:Horses; D009330:Nebulizers and Vaporizers; D009985:Orthopedics / Q000662:veterinary*
chemical_list: D006221:Halothane