Table 1 AAST organ injury scale – liver injury
Grade | Injury type | Injury description |
|---|---|---|
I | Haematoma | Subcapsular < 10 % surface |
|  | Laceration | Capsular tear < 1 cm parenchymal depth |
II | Haematoma | Subcapsular 10–50 % surface area; intraparenchymal, < 10 cm diameter |
|  | Laceration | 1–3 cm parenchymal depth, < 10 cm in length |
III | Haematoma | Subcapsular > 50 % surface area or expanding, ruptured subcapsular or parenchymal haematoma. Intraparenchymal haematoma > 10 cm |
|  | Laceration | > 3 cm parenchymal depth |
IV | Laceration | Parenchymal disruption 25–75 % of hepatic lobe |
V | Laceration | Parenchymal disruption involving > 75 % of hepatic lobe |
| Â | Vascular | Juxtavenous hepatic injuries i.e., retrohepatic vena cav/central major hepatic veins |
VI | Vascular | Hepatic avulsion |