Table 1: Classification of liver injury (adapted from the American Association for the Surgery of Trauma (AAST) guidelines [22].
Grade |
Laceration |
Haematoma |
Vascular Injury |
I |
Capsular tear · < 1 cm depth |
Sub-capsular · < 10% surface area |
|
II |
Intra-parenchymal · < 10 cm diameter · 1-3 cm depth · < 10 cm length |
Sub-capsular · 10-50% of surface area |
|
III |
Intra-parenchymal · > 3 cm depth |
Sub-capsular · 50% surface area/expanding · ruptured Intra-parenchymal · 10 cm/expanding · ruptured |
|
IV |
Parenchymal disruption · 25-75% of hepatic lobe · 1-3 Couinaud segments within a single lobe |
|
|
V |
Parenchymal disruption · 75% of hepatic lobe · > 3 Couinaud segments within a single lobe |
|
Juxta-hepatic venous injuries · retro-hepatic cava · major hepatic veins |
VI |
|
|
Hepatic avulsion |