IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-11-4-41755 Original Research Paper COMPARATIVE EVALUATION OF EPIDURAL TRAMADOL VERSUS EPIDURAL BUPRENORPHINE FOR POSTOPERATIVE ANALGESIA IN PATIENTS UNDERGOING LOWER ABDOMINAL SURGERIES: A PROSPECTIVE RANDOMIZED DOUBLE BLIND STUDY Gaurav Goyal Dr. Dr. Sakshi Kanoji Dr. April 2022 11 4 01 02