Obturator block ultrasound

For ultrasound-guided obturator nerve block, the pectineus and adductor longus and brevis muscles are visualized. In this view, the anterior branch of the obturator nerve is visualized between the adductor longus and pectineus muscles, and the posterior branch is visualized between the adductor brevis and adductor magnus muscles. The needle is inserted in-plane (dashed arrows) or out-of-plane (solid arrows), to place the tip in each of the two intermuscular fascial planes. For further details, refer to UpToDate content on obturator nerve block.