Neuroleptanalgesia and anesthesia in poor-risk patients.
D000367:Age Factors; D000368:Aged; D000768:Anesthesia, General; D001544:Benperidol; D006801:Humans; D008875:Middle Aged; D009458:Neuroleptanalgesia; D009609:Nitrous Oxide
D001544:Benperidol; D009609:Nitrous Oxide