title: Background infusion during intravenous patient-controlled analgesia: the new routine analgesia?
mesh_terms: D015360:Analgesia, Epidural; D016058:Analgesia, Patient-Controlled; D000701:Analgesics, Opioid / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D005283:Fentanyl / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D006801:Humans; D007262:Infusions, Intravenous
chemical_list: D000701:Analgesics, Opioid; D005283:Fentanyl