IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-12-5-49322 Original Research Paper Comparison Of Efficacy Of Epidurally Administered Butorphanol And Tramadol In Providing Postoperative Pain Relief In Elective Lower Limb Surgeries - An Observational Study Asmita Desai Dr. Dr. Raviraj Shivajirao Pol Dr. May 2023 12 5 01 02