Erector Spinae Catheter Versus Paravertebral Catheter for Postoperative Analgesia in Cancer Patients Post Mastectomies

All patients admitted in National Cancer institute, Cairo University for breast surgeries will be investigated for inclusion criteria in the current study. And will be enrolled if fulfilled the criteria into 2 groups .70 patients will be included in this prospective randomized study. The patients will be allocated into two groups: the ESPB group (group E, n = 35) , and the paravertebral group (group P, n =35) * All patients will do Ultrasound-guided ESPB for group E and PVB for group P before receiving general anesthesia * Postoperatively Patients in both groups will receive intravenous morphine 3 mg as rescue analgesic