[Location ] Localized in the supine position, on the anterior median line of the lower abdomen, at the midpoint of the upper border of the symphysis pubis. (Fig.74)
 
[Regional Anatomy] Skin→subcutaneous tissue→linea alba→transverse fascia→extraperitoneal fat tissue→parietal peritoneum. Superficial layer, the distribution of the anterior cutaneous branches of the iliohypogastric nerve, the subordiantial ramus of the superficial epigastric vein; deep layer, the branch of the iliohypogastric nerve.