Comparison Between Quadro-iliac Plane Block (QIPB) and Supra-Inguinal Fascia Iliaca Compartment Block (S-FICB) for Total Hip Arthroplasty

This randomized clinical trial aims to evaluate and compare the analgesic efficacy and functional outcomes of the quadro-iliac plane block (QIPB) and the supra-inguinal fascia iliaca compartment block (S-FICB) in patients undergoing total hip arthroplasty. The primary outcome is the Numeric Rating Scale (NRS) within the first 48 hours after surgery. Secondary outcomes include postoperative total opioid consumption, ıncidence of quadriceps motor block, time to first ambulation, block performance time, falls, length of hospital stay, block- related complications(hematoma,local anesthetic systemic complications, vascular puncture, and infection), patient satisfaction assessed using a Likert scale, and incidence of postoperative nausea and vomiting.

Inclusion Criteria: * Age between 18 and 80 years * American Society of Anesthesiologists physical status I-III * Scheduled for elective unilateral primary total hip arthroplasty * Surgery planned under spinal anesthesia * Ability to understand and use the Numeric Rating Scale * Written informed consent provided Exclusion Criteria: * Refusal to participate * Revision total hip arthroplasty * Bilateral total hip arthroplasty * Contraindication to spinal anesthesia * Contraindication to peripheral nerve block * Known allergy to local anesthetics or study drugs * Coagulopathy or anticoagulant use incompatible with neuraxial/regional anesthesia * Infection at the block injection site * Pre-existing neurological deficit involving the operative lower extremity * Peripheral neuropathy * Chronic opioid use * Cognitive impairment or inability to communicate reliably * Severe hepatic or renal failure * Body mass index \>35 kg/m² * Pregnancy