Intravenous supplementation during nitrous oxide anesthesia: application of multiple covariant analysis to the comparison of demerol, morphine and a new potent analgesic drug (15431).
D000700:Analgesics; D000758:Anesthesia; D000776:Anesthesiology; D006801:Humans; D008614:Meperidine; D009020:Morphine; D009609:Nitrous Oxide
D000700:Analgesics; D009020:Morphine; D008614:Meperidine; D009609:Nitrous Oxide
NITROUS OXIDE