title: An apparently normal looking valve as a cause of rebreathing.
authors.forename: A M S
authors.initials: AM
authors.lastname: Dawood
authors.forename: T
authors.initials: T
authors.lastname: Digger
mesh_terms: D000764:Anesthesia, Closed-Circuit / Q000295:instrumentation*; D002245:Carbon Dioxide / Q000032:analysis; D004868:Equipment Failure; D006801:Humans
chemical_list: D002245:Carbon Dioxide