Erector Spinae Plane Block Versus Thoracic Paravertebral Block for Pain Control in Modified Radical Mastectomy

Primary outcome of our study is to compare the effectiveness of two regional anesthesia techniques, ESP block and TPV block, in the post-operative pain-control after radical mastectomy. We will also evaluate both intra and post-operative opioid consumption, the incidence of PONV, the length of hospital stay, patient satisfaction with the anesthesiology technique and the incidence of chronic pain 6 months after surgery.