OPPOSED Study Comparing SIFI Block Versus Lumbar ESP Block for Regional Anesthesia in Anterior Approach Hip Arthroplasty

What this Trial Is About

Researchers are comparing two regional anesthesia techniques to manage postoperative pain in patients undergoing total hip replacement surgery using the direct anterior approach. This surgery is commonly done for conditions like degenerative osteoarthritis, osteonecrosis, congenital disorders such as dysplasia, and inflammatory arthritis. The direct anterior approach aims to spare hip muscles, reduce dislocation risk, limit soft tissue damage, and support quicker recovery, but patients can experience moderate to severe pain and opioid-related side effects after surgery. The study compares the Suprainguinal Fascia Iliaca (SIFI) block and the lumbar Erector Spinae Plane (ESP) block, both involving infiltration of local anesthetics (Ropivacaine 0.375, 40 mL) in specific nerve or fascial areas. Participants receive one of these two blocks during surgery. The primary focus is on nerve block incidence 8 hours post-surgery. Secondary goals include measuring recovery time for lower limb movement, opioid use, pain levels, sensory block extent, hospital discharge timing, and rates of chronic pain and complications up to 90 days after surgery. Participants will be monitored through physical assessments evaluating nerve function, pain using the Numeric Rating Scale, opioid consumption, and sensory nerve block at 8, 24, and 48 hours post-surgery. Researchers will also track postoperative complications, hospital discharge timing, and persistent pain at 30 and 90 days. The total involvement includes surgery, immediate postoperative monitoring, and follow-up visits to assess recovery and side effects.

OPPOSED (anteriOr hiP arthroPlasty regiOnal aneSthEsia stuDy) Study