腹膜后从解剖学上可分为3区，第1区是上方中央区，从横膈主动脉裂孔向下至骶岬，其中包括主动脉、门静脉、十二指肠、下腔静脉及其内脏支、胰头。第2区在第1区两旁，其中重要脏器有肾和升、降结肠。第3区主要包括盆腔脏器和骼血管。在钝性伤中，凡见有第1区腹膜后血肿者均需进 Retroperitoneal anatomy can be divided into 3 zones, the first zone is the upper central area, down from the diaphragm aortic hole to the sacral promontory, including the aorta, portal vein, duodenum, inferior vena cava and its internal organs Branch, head of the pancreas. Area 2 in the 1st district on both sides, including important organs kidney and ascending, descending colon. Area 3 mainly includes pelvic organs and iliac vessels. In blunt trauma, who see there is a District 1 retroperitoneal hematoma who are required to enter