Lucas (1977) classification method, respectively, the degree of duodenal and pancreatic injury is divided into four levels: I. Duodenal injury: Grade I: duodenal contusion, duodenal wall hematoma or plasma membrane tear, no perforation, no pancreatic injury. Grade II: duodenal rupture or perforation, no pancreatic injury. Grade III: any type of duodenal injury accompanied by a less extensive pancreatic injury, such as pancreatic contusion, hematoma, or marginal laceration, but none of which injured the ducts of the pancreas. Grade IV: duodenal injury combined with severe pancreatic injury, such as pancreatic transection, extensive contusion or multiple lacerations and bleeding of the head of the pancreas (severe compound injury). Pancreatic injury: Grade I: contusion of the pancreas, or marginal laceration, without injury to the ducts of the pancreas. Grade II: severe laceration, penetrating injury or transverse injury to the body or tail of the pancreas located to the left of the portal vein and possible injury to the pancreatic ducts, without duodenal injury. Grade III: transverse injury, massive laceration of the head of the pancreas, or fracture of the pancreatic duct, distended hematoma or fragmentation injury without duodenal injury. Grade IV: massive laceration, transection or crushing injury of the head of the pancreas with duodenal rupture (severe compound injury) ——————- New criteria: Grade 1: hematoma Limited to one segment Tear Partial tear of the intestinal wall without perforation Grade 2: hematoma Greater than one segment Tear Full lamina, <1/2 circumference Grade 3: tear Full lamina, 1/2-3/4 circumference (second segment) >1/2 circumference (first Grade 4: laceration second segment >3/4 circumference involving the pot belly segment Grade 5: laceration duodenopancreatic head disruption vascularization complete loss of blood supply to duodenum Note: multiple injuries increase the grading by one grade