title: A rebreathing non-rebreathing valve.
authors.forename: C J
authors.initials: CJ
authors.lastname: Day
authors.forename: J P
authors.initials: JP
authors.lastname: Nolan
mesh_terms: D004868:Equipment Failure; D005260:Female; D006801:Humans; D008875:Middle Aged; D010360:Patient Transfer; D011182:Postoperative Care / Q000295:instrumentation*; D012122:Ventilators, Mechanical