Abstract

Background: Ultrasound guided sciatic nerve block has been proved to be effective in pain control for lower limb surgeries fortunately, it can be performed at different levels via different approaches. In this prospective, randomized, observational study, we compared the efficacy of ultrasound guided Subgluteal space injection versus Perineural space injection technique in posterior sciatic nerve group in patients undergoing below knee surgeries. Methodology- The study was conducted in the Department of Anaesthesiology at Bhagwan Mahaveer Jain Hospital, Bengaluru which included 60 ASA grade I and III patients between the ages of 18 and 80 who underwent below knee surgeries. After obtaining ethical committee clearance and informed consent, the patients were randomly allocated into two groups of 30 each by a computer generated random table to receive 25 ml of 0.75% ropivacaine with 45mcg of clonidine in Group I and in Group II. The onset time of sensory and motor blockade were observed between the groups. Results :-The total anesthesia related time was faster in Group II when compared to Group I (p<0.0001). There were no significant haemodynamic changes in the study group. Conclusion- Perineural space injection (Group II) in Posterior sciatic nerve block has shorter onset and total anesthesia related time in comparison to Subgluteal space injection (Group I).

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