Total hip arthroplasty (THA) is the second most common joint replacement surgery, partly due to the aging population. The primary aim of this study is to compare the analgesic efficacy of Pericapsular nerve group (PENG) block with intra-articular and Quadrotus lumborum block (QLB). Regional anesthesia (RA), such as the recently described pericapsular nerve group (PENG) block, may provide additional analgesic benefit in this situation. Pericapsular nerve group (PENG) block is a new regional anesthesia technique to provide analgesia after hip fractures and hip arthroplasty. The aim of this single-center, double-blind, randomized controlled trial is to confirm the efficacy of PENG block for postoperative recovery after primary THA.~Routine multimodal analgesia will be used for postoperative analgesia
90 patients ASA I-III, undergoing Total hip arthroplasty (THA) under spinal anesthesia, will be randomly assigned into one of three groups, namely group A (n=30), where an PENG block, group B (N:30) where an inra-articuler, and group C (n=30) where Quadratus lumborum block will be performed preoperatively. All patients will receive a standardized postoperative analgesia regimen. NRS scores will be evaluated in static and dynamic conditions during the first 48 hours postoperatively.