The serratus plane is interstitial tissue, below the serratus muscle. The injection of bupivacaine numbs the anterior branch of the thoracodorsal nerve. This technique allows for the medication to diffuse along the area of the serratus plane to provide numbing of that area. Upon completion of the block, the patient will be evaluated for extubation and emerged from general anesthesia if appropriate.

All subjects will receive fentanyl intravenous patient controlled anesthesia pumps as part of standard care. The amount of fentanyl self-administered by the patient or given by a clinician during 24 hours following surgery will be compared amongst the two groups.

Group receiving general anesthesia with the serratus block

The primary endpoint of the study will be comparison of the amount of intravenous opiates used during the immediate postoperative period between the 2 groups, the group receiving general anesthesia with the serratus block and the group receiving general anesthesia alone.