Tehran University of Medical Sciences Archives of Anesthesiology and Critical Care 2423-5849 9 3 2023 06 25 195 200 EN Shilpa Acharya Department of Anesthesiology, Smt. Kashibai Navale Medical College and General Hospital, MUHS-NASHIK, Pune, India. Geetha Acharya Department of Anesthesiology, Symboisis Medical College for Women, Symbiosis International Deemed University, Lavale, Munshi, Pune, India. Shreya Rawekar Department of Anesthesiology, Smt. Kashibai Navale Medical College and General Hospital, MUHS-NASHIK, Pune, India. 2022 04 25 2022 06 11 Background: Primary objective: • Duration of block • Post-operative pain score • Post-operative rescue analgesic consumption Secondary objective: • To observe patient satisfaction score • Occurrence of post-operative complications if any. Methods: A total of 60 patients, aged between 18-60yrs, belonging to ASA I & II with hip osteoarthritis requiring total hip arthroplasty (THA) were divided into two groups of 30 each. Patients were randomized into two groups and were given ipsilateral USG guided anterior QLB in the fascial plane between QL and psoas major muscles after surgery. Group C received 30ml NS and group T received 30ml of inj. Ropivacaine 0.2%. Post operatively patient received inj. PCM 1G TDS. Duration of block, requirement of rescue analgesia, VAS score and side effects were the parameters those were monitored and compared. Results: Mode pain score by VAS was significantly lower in T group(p<0.05) than C group which required more analgesia. (The chi-square value-5.9341, p=0.0148). Duration of block was more in T group. Patient satisfaction was noted to be better in T group. Conclusion: Use of post-operative USG guided Ant. QLB reduced VAS score in patient undergoing THA. It also significantly decreased the requirement of post- operative rescue analgesia and improved patient satisfaction. https://aacc.tums.ac.ir/index.php/aacc/article/view/525