A comparative study of effect of intrathecal hyperbaric Ropivacaine 0.75% vs hyperbaric Bupivacaine 0.5% for postoperative analgesia in Infraumblical surgeries

With due approval of institutional ethical committee a double blinded randomized study will be conducted. 100 participatnts who will be undergoing infraumbilical surgeries under spinal anaesthesia. 50 participants will be grouped into Group R and will be recieving Hyperbaric Ropivacaine 0.75% 3ml intrathecally under all aseptic precautions. 50 participants will be grouped into Group B Will be recieving hyperbaric Bupivacaine 0.5% 3ml intrathecally . A  written informed consent will be taken prior to procedure.Participants will be monitored for duration of analgesia as primary outcome and onset and duration of sensory block, motor block and hemodynamic adverse effects as secondary outcome in intraopertive and  post operative period till patients complains of pain or demands for rescue analgesia for fisrt time. Data will be collected and analyzed using standard test  and p value of less than 0.05 will be considered significant.