title: A hazardous modification of a heat and moisture exchanger.
authors.forename: A J
authors.initials: AJ
authors.lastname: Ferguson
authors.forename: D A
authors.initials: DA
authors.lastname: Orr
mesh_terms: D000402:Airway Obstruction / Q000209:etiology*; D004867:Equipment Design; D004868:Equipment Failure; D006801:Humans; D006813:Humidity; D008297:Male; D008875:Middle Aged; D014139:Tracheostomy / Q000295:instrumentation*