A clinically relevant liver injury grading system by CT, preliminary report

Area of Science:

• Radiology
• Trauma Surgery
• Medical Imaging

Background:

• Current computed tomography (CT) grading scales for liver injuries are primarily anatomic and lack reliability in predicting the need for surgical or angioembolization intervention.
• Accurate CT-based assessment is crucial for timely and appropriate management of hepatic trauma.

Purpose of the Study:

• To develop and evaluate a clinically relevant CT grading system for liver injuries that predicts the necessity for intervention.
• To identify specific CT features associated with the need for intervention in hepatic trauma.

Main Methods:

• Review of CT scans from 11 patients with hepatic injury to identify intervention-associated criteria.
• Establishment of five key features: laceration in ≥3 segments, hilar involvement, hemoperitoneum, active extravasation, and sentinel clot.
• Evaluation of these criteria's predictability in 24 additional CT scans by radiologists, comparing inter-observer agreement with the American Association for the Surgery of Trauma (AAST) system.

Main Results:

• Active extravasation and sentinel clot demonstrated the highest specificity in predicting the need for intervention.
• The proposed new grading system exhibited superior inter-observer agreement (k=0.56) compared to the AAST grading system (k=0.47).

Conclusions:

• Active extravasation and the presence of a sentinel clot are critical indicators for intervention in liver injuries.
• The developed CT grading system offers improved reliability and inter-observer agreement for managing hepatic trauma.