sensory levels of analgesia ( to pinprick ) and pain ( on a five-point scale ) were assessed hourly for 16 hours during continuous epidural infusion of 0.5 % plain bupivacaine ( 8 ml/hr ) in 12 patients with chronic nonsurgical pain and in 30 patients after major abdominal surgery performed under combined bupivacaine and halothane -- n2o general anesthesia .
C0030193
pain
C0006400
bupivacaine