Comparison of Perioperative Opioid Consumption Following Pectoral Nerve Block for Breast Cancer Surgery

In this study, the investigators will compare the intraoperative opioid consumption for patients undergoing breast cancer surgery. The patients will be divided in two groups, the first one will receive a pectoral nerve block right after induction of anesthesia and the second one, the control group, will not receive the pectoral block. Our hypothesis is that the pectoral nerve block reduces the opioid consumption during the surgery.