For educational and reference use only. These calculators do not replace clinical judgement, local protocols, or a qualified clinician. Verify every result independently before it informs patient care.
Emergency radiology
AAST Liver Injury (2018)
AAST 2018 liver injury grade computed from the CT findings. The most severe feature determines the grade.
Result
No injury by these criteria
No injury identified by these criteria.
Formula
Grade = the most severe of haematoma / laceration / parenchymal disruption / vascular injury (AAST 2018).
Disclaimer
Grade is the most severe feature present. A vascular injury, defined by the 2018 update as a pseudoaneurysm or arteriovenous fistula, or active bleeding raises the grade on its own: contained within the organ that is grade III for liver and kidney, and grade IV for spleen. Advance one grade for multiple (bilateral, for kidney) injuries, up to grade III. These are the CT criteria; the AAST grade is the HIGHEST of the imaging, operative and pathologic criteria, so operation or pathology can raise it. Management depends on haemodynamic stability, not the CT grade alone.
For educational and reference use only. These calculators do not replace clinical judgement, local protocols, or a qualified clinician. Verify every result independently before it informs patient care.
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