ABSTRACT
Patient Position The patient is positioned supine, and the anesthesiologist stands on the side to be blocked.
Landmarks This approach is based on the bony relationship of the anterior superior iliac spine and the pubic tubercle. The anterior superior iliac spine and the pubic tubercle are palpated, and the overlying skin is marked. A line is drawn joining these two points, and it is divided into thirds. A perpendicular line is drawn at the junction between the outer one-third and the inner two-thirds. The needle insertion site is 1 to 2 cm below the intersection of these two lines.
