Fig. 1
From: A randomized controlled trial of iliopsoas plane block vs. femoral nerve block for hip arthroplasty
Iliopsoas Plane Block (a) and Femoral Nerve Block (b). Sa represents the Sartorius muscle, RF represents the Rectus Femoris muscle, IP represents the Iliopsoas muscles, and HoF represents the Head of Femur. The white asterisk indicates the Iliofemoral ligament, FN represents the Femoral Nerve, “A” represents the Femoral Artery, and the white arrow shows the needle trajectory of the nerve block