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Table 2 Classification system of abdominal vascular system [17–19]

From: WSES position paper on vascular emergency surgery

OIS grade

Description of injuries

I

Non-named superior mesenteric artery and vein, and their branches, phrenic artery/vein, lumbar artery/vein, gonadal artery/vein, ovarian artery/vein

II

Right, left, common hepatic artery, splenic artery/vein, right or left gastric arteries, gastroduodenal artery, inferior mesenteric artery/vein, primary branches of mesenteric artery/vein

III

Superior mesenteric vein trunk, renal artery/vein, iliac artery/vein, hypogastric artery/vein, vena cava, infrarenal

IV

Superior mesenteric artery trunk, celiac axis proper, vena cava suprarenal and infrahepatic, aorta, infrarenal.

V

Portal vein, extra-parenchymal hepatic vein, vena cava retrohepatic or suprahepatic, aorta suprarenal, subdiaphragmatic