Close scavenging of anaesthetic gases during mask anaesthesia. Further experimental and clinical studies of a method of reducing anaesthetic gas contamination.
D000397:Air Pollution / Q000517:prevention & control*; D000776:Anesthesiology / Q000295:instrumentation*; D000777:Anesthetics / Q000302:isolation & purification*; D006801:Humans; D009609:Nitrous Oxide / Q000302:isolation & purification; D009873:Operating Rooms
D000777:Anesthetics; D009609:Nitrous Oxide