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Postoperative pain is a common complaint following laparoscopic nephrectomies and inthese patients transverse abdominis (TAP) block is a useful an effective analgesic modality in controllingpain compared to other techniques. This prospective randomized comparative study is to compare theanalgesic efficacy of unilateral TAP block versus bilateral TAP block for better analgesia postoperatively.Materials and Methods: A total of 60 ASA I-II patients undergoing lapararoscopic nephrectomies (18-60 years) were included and divided into two groups A(n=30) and B(n=30). Group A: Lateral ultrasoundguided(USG) unilateral TAP block with 20ml of 0.25% isobaric bupivacaine. Group B: Lateral USG guidedbilateral TAP block with 20ml of 0.25% isobaric bupivacaine at the end of surgery before extubation.Statistical Design: the statistical testing conducted using statistical package for the social science system.For all statistical tests, a p value less than 0.05 was taken to indicate a significant difference.Results: We found that total mean analgesic duration of the block was significantly longer in bilateral(B) group (14.3h2.48h rs) as compared to group A(6.22.14hrs) with p value of 0.17564. VASscores were significantly higher in the group A with p value of 0.124575. The mean number ofdoses of additional rescue analgesia (i.e fentanyl) in Group A was 3.12 0.72 as compared to 1.04 0.73in Group B (given at 18 hrs.), the p value comes out to be 0.125 which is statistically significant.Conclusion: Bilateral USG guided TAP block is of more benefit than unilateral TAP block in reducingpostoperative pain and also reduced overall use of opioids in laparoscopic nephrectomies.Keywords: Nephrectomies, Ultrasound, TAP block, Bilateral.

indian journal of clinical anaesthesia

A comparative study to evaluate the analgesic efficacy of unilateral transvere abdominis plane block versus bilateral tap block using 0.25% bupivacaine in laparoscopic nephrectomies