British Journal of Anaesthesia, 1982, Vol. 54, No. 5 555-559
© 1982 The Board of Management and Trustees of the British Journal of Anaesthesia
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HALOTHANE ADSORPTION COMPLICATING THE USE OF SODA-LIME TO HUMIDIFY ANAESTHETIC GASES
Department of Anesthesiology, Columbia University New York, New York, U.S.A.
Department of Anesthesiology, University of Connecticut Farmington, Connecticut, U.S.A
Present address for correspondence: Columbia-Presbyterian Medical Center, New York, New York, 10032, U.S.A.
If tbe anaesthetic circle system is arranged to increase the humidity of fresh anaesthetic gases by placing the carbon dioxide absorbent canister between the fresh gas inlet and the patient, drying of the soda-lime can occur. Very dry soda-lime adsorbs significant quantities of halothane. Using fresh soda-lime, effluent halothane concentration reached 50% of the input concentration in 35 s, but this time increased to 500s when dry soda-lime was used The use of dry soda-lime can result in a slow inhalation induction or in the release of adsorbed halothane during a subsequent anaesthetic.
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