A Prospective Randomized Controlled Double Blinded Study Comparing the Efficacy of Hyperbaric Bupivacaine v/S Hyperbaric Ropivacaine in Subarchanoid Block for Lower Limb Surgeries

Background: The most popular regional anesthesia method is spinal anesthesia because it is simple to administer, affordable, and results in rapid onset of anesthesia and total muscle relaxation. Materials And Methods:Atotal of 60 ASAGrade 1 and 2 patients undergoing lower limb surgeries under spinal anaesthesia were randomly divided into two groups (30 each). Group B received 3ml of 0.5% hyperbaric bupivacaine intrathecally. Group R received 3ml of 0.75% hyperbaric ropivacaine intrathecally. Using a 26G/25G Quincke spinal needle and aseptic precautions, a subarachnoid block was administered between the L3 and L4 space following a clear and free ow of CSF while seated. Hemodynamics, side effects, effectiveness and length of action were observed. Statistical analysis was performed by using SPSS Version 21.0 and P < 0.05 was considered to be signicant. Results: Current results show that, BMI, age, sex, weight did not signicantly differ between the two groups. We found that when using Bupivacaine instead of Ropivacaine, the mean onset of sensory block was faster (3.56 vs 4.22 mins), and the duration was longer (267.83 vs 218.17 mins). In comparison to Ropivacaine, the mean onset of motor block was faster (4.73vs5.2mins) and the duration was longer (191.68 vs 165.17 mins) with bupivacaine. Conclusion: Hyperbaric Ropivacaine is a safe substitute for Bupivacaine in lower limb surgeries, particularly those that are shorter in duration and that aid in early ambulation. It also reliably produces spinal anaesthesia with less hypotension than Bupivacaine.