[Analgesia in breast surgery with interpleural bupivacaine]

A control group of 15 patients undergoing breast surgery was given general anesthesia. In 15 other patients an interpleural block with 0.4 ml/kg bupivacaine, 0.5%, was performed 20 minutes before induction of general anesthesia for pre-emptive analgesia. This was extended further by continuous administration of bupivacaine 0.25%, 0.125 ml/kg/hr by automatic infusion pump, with supplements of opiates for postoperative pain management. The combined technique was associated with significantly reduced perioperative opiate requirement with better emergence from anesthesia, fewer side effects, a prolonged pain-free period, and overall better quality of postoperative recovery.