IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-9-10-32333 Original Research Paper A Prospective comparative study of intraperitoneal instillation of bupivacaine with tramadol or dexmedetomidine to assess postoperative analgesia after laparoscopic cholecystectomy Kaki Lavanya Dr. Dr. B. S. T. Sai Dr. October 2020 9 10 01 02