Liver Trauma

CT scan criteria for staging liver trauma based on the AAST liver injury scale include the following:

• • Grade 1 - Subcapsular hematoma less than 1 cm in maximal thickness, capsular avulsion, superficial parenchymal laceration less than 1 cm deep, and isolated periportal blood tracking

  • Grade 2 - Parenchymal laceration 1-3 cm deep and parenchymal/subcapsular hematomas 1-3 cm thick

  • Grade 3 - Parenchymal laceration more than 3 cm deep and parenchymal or subcapsular hematoma more than 3 cm in diameter

  • Grade 4 - Parenchymal/subcapsular hematoma more than 10 cm in diameter, lobar destruction, or devascularization

  • Grade 5 - Global destruction or devascularization of the liver

  • Grade 6 - Hepatic avulsion