Injured structure and AAST grade | Characteristics of injury | AIS − 2005 score |
---|---|---|
Pancreas | ||
I | Small hematoma without duct injury; superficial laceration without duct injury | 2 |
II | Large hematoma without duct injury or tissue loss; major laceration without duct injury or tissue loss | 2 |
III | Distal transection or parenchymal laceration with duct injury | 3 |
IV | Proximal transection or parenchymal laceration involving ampulla | 4 |
V | Massive disruption of pancreatic head | 5 |
Duodenum | ||
I | Single-segment hematoma; partial-thickness laceration without perforation | 2 |
II | Multiple-segment hematoma; small (\50% of circumference) laceration | 2 |
III | 50–75% Disruption (laceration) of segment D2 or 50–100% disruption of segment D1, D3, or D4 | 3 |
IV | Large (75–100%) laceration of segment D2; rupture of ampulla or distal CBD | 4 |
V | Massive duodenopancreatic injury; devascularization of duodenum | 5 |