Fig. 1From: Anterior quadratus lumborum block for postoperative recovery after total hip arthroplasty: a study protocol for a single-center, double-blind, randomized controlled trialUltrasound image of anterior quadratus lumborum block (QLB). Triangles indicate needles. Abbreviations: ES erector spinae muscle, LA local anesthetic, PM psoas major muscle, QL quadratus lumborum muscle, TP transversus process, VB vertebral bodyBack to article page