Patient-controlled analgesia.
D000701:Analgesics, Opioid / Q000008:administration & dosage*; D006801:Humans; D009019:Morphinans / Q000008:administration & dosage*; D009266:Nalbuphine / Q000008:administration & dosage*; D010149:Postoperative Pain / Q000188:drug therapy; D012646:Self Administration
D000701:Analgesics, Opioid; D009019:Morphinans; D009266:Nalbuphine