Comparison of erector spinae plane block and local anaesthetic infiltration of the incision site with 0.375% ropivacaine for postoperative analgesia in percutaneous nephrolithotomy.

Erector spinae block is found to be effective in variety of procedures.This study is designed to evaluate the efficacy of USG guided Erector spinae block(ESP) for postoperative analgesia following percutaneous nephrolithotomy(pcnl).It is a prospective double blind parallel group study comparing erecor spinae block with local site infiltration with 0.375% ropivacaine for postoperative pain relief for pcnl.Inclusion criteria included ASA 1 and 2 patients aged between 18 and 70 years  of both sexes.Exclusion criteria included BMI>35 KG/m2 ,ASA 3 AND 4,allergic history to local anaesthetics,sepsis or bacreimia.Patients in group L received 20ml of 0.375% ropivacaine at the incision site subcutaneously with hupodermic needle locally and Group E received USG guided ESP block with 0.375% ropivacaine at T10 level.Numeric rating pain scale was measured postoperatively at 30 min,60 min then hourly for 6 hours followed by 4th hourly for 24 hours.The primary objective of the study was to compare NRS scores postoperatively between two groups.The secondary objective was to compare the rescue analgesia requirement between both gropus for 24 hours.