Hepatic injury grading

Abdomen

AAST Grading for Hepatic injury

Grade I

Subcapsular hematoma < 10% surface area or capsular tear < 1 cm depth

Grade II

Subcapsular hematoma 10–50% surface area, intraparenchymal hematoma < 10 cm diameter, or capsular tear, 1–3 cm depth and < 10 cm length

Grade III

Subcapsular hematoma >50% surface area, active bleeding, intraparenchymal hematoma > 10 cm diameter, or capsular tear > 3 cm depth

Grade IV

Intraparenchymal hematoma with active bleeding, parenchymal disruption involving either 25–75% hepatic lobes or 1–3 Couinaud segments within one lobe

Grade V

Parenchymal disruption involving > 75% of one hepatic lobe or > 3 Couinaud segments within one lobe, inferior vena cava laceration, or hepatic vein laceration

Grade VI

Hepatic avulsion