The U.S. National Cancer Institute does not currently endorse any foreign translations of PDQ® and no such endorsement should be inferred for the following translation.

  patient-controlled analgesia


　　

PCA. A method of pain relief in which the patient controls the amount of pain medicine that is used. When pain relief is needed, the person can receive a preset dose of pain medicine by pressing a button on a computerized pump that is connected to a small tube in the body.