Comparative Study of Isobaric Ropivacaine with and without Morphine in Spinal Anaesthesia for Perineal Surgeries

Objectives: The comparative study is under taken to evaluate use of intrathecal isobaric ropivacaine with and without adjuvant morphine in perineal surgeries. Aims: The aim of this study is to evaluate sensory block, motor block and other clinical effects with 3 ml of isobaric 0.5% ropivacaine along with 100µ morphine and without mophine intrathecally in Perineal surgeries . Methods: This study was conducted in 100 patients scheduled for elective Perineal surgeries. The patients were grouped as study and control group with 50 patients in each group. The study group received 3ml of 0.5% isobaric ropivacaine with 100µ morphine intrathecally and control group received only 3ml of 0.5% isobaric ropivacaine. Onset and duration of sensory block, motor block, quality of anaesthesia, time of request for analgesia, time for ambulation, VAS score, hemodynamic parameters and adverse effects if any were studied. Results: In present study faster in onset of sensory block with normal duration sensory block was observed in study group. In addition short duration of motor block, with early ambulation was noted in study group. Requirement of rescue analgesia was prolonged with duration of 5.92 hrs in study group in comparison to control group which was 4.00 hrs and this was statically significant. Conclusion: Intrathecal administration of Isobaric ropivacaine with 100µ morphine provides better quality of sensory block, faster onset sensory block with shorter duration of motor block, enabling early ambulation and significantly prolonged analgesia.