Intravenous obstruction and PCA machines.
Paterson
J G
JG
D000368:Aged; D016058:Analgesia, Patient-Controlled / Q000295:instrumentation*; D000701:Analgesics, Opioid / Q000008:administration & dosage / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007262:Infusions, Intravenous; D008614:Meperidine / Q000008:administration & dosage / Q000009:adverse effects*
D000701:Analgesics, Opioid; D008614:Meperidine