Continuous Quadroiliac Plane Block for Postoperative Analgesia After Total Hip Arthroplasty: A Case Report

The quadroiliac plane block (QIPB) is a novel posterior fascial plane technique targeting the quadratus lumborum fascia at the iliac crest. We describe a 68-year-old, 88-kg woman with breast cancer-related lymphedema who underwent total hip arthroplasty under general anesthesia and declined neuraxial anesthesia. A continuous QIPB was performed postoperatively using an epidural catheter inserted into the posterior thoracolumbar fascial plane. After an initial 40 mL of 0.25% bupivacaine, infusion continued at 10 mg/h. Sensory spread progressed from L2-L4 to L1-L5 within 1 hour. Pain scores remained ≤2 without opioids, and no complications occurred.