in a double-blind comparative study of 46 women undergoing laparoscopic tubal sterilization under general anesthesia using falope ring bands , the group of women ( study group , n=22 ) having 0.5 % bupivacaine instilled paracervically had less pain than women given normal saline ( control group , n=24 ) at 1 and 2 hours .
C0006400
bupivacaine
C0030193
pain