Ultrasound-Guided Quadro-Iliac Plane Block for Pain Management After Total Hip Arthroplasty

Total hip arthroplasty is associated with significant postoperative pain. The Quadro-Iliac Plane (QIP) block is a recently described fascial plane block targeting the area where the quadratus lumborum muscle attaches to the iliac crest and may provide more comprehensive analgesia. This study is designed as a prospective, randomized, double-blind clinical trial including patients aged 18-80 years with ASA physical status I-III undergoing elective primary total hip arthroplasty. Patients will be randomized into two groups. The QIP group will receive an ultrasound-guided QIP block with 40 mL of 0.25% local anesthetic solution containing epinephrine, and the control group will receive a sham block with 40 mL of 0.9% NaCl using the same technique. The primary outcome is postoperative 24-hour opioid consumption. Secondary outcomes include motor block, and dermatomal sensory assessment, pain scores, quality of recovery (QoR-15), rescue analgesic requirement and opioid-related side effects