[Location] Localized in the supine position, on the anterior median line of the upper abdomen, 4 cun above the umbilicus. (Fig.75)
 
[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 prior branches of the eighth thoracic nerve, the subordiantial ramus of the superficial epigastric vein; deep layer, the branch of the prior branches of the eighth thoracic nerve.