Inhalational anaesthesia.
D000368:Aged; D000758:Anesthesia; D000769:Anesthesia, Inhalation; D000776:Anesthesiology; D000777:Anesthetics; D018685:Anesthetics, Inhalation; D006801:Humans; D001239:Inhalation
ANESTHESIA AND ANESTHETICS/inhalation