Four-step nitrous oxide-pentothal-anesthesia.
D000758:Anesthesia; D000769:Anesthesia, Inhalation; D000776:Anesthesiology; D006801:Humans; D009609:Nitrous Oxide; D013874:Thiopental
D013874:Thiopental; D009609:Nitrous Oxide
ANESTHESIA, INHALATION