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Table 1 AAST splenic laceration grading by CT. Other findings on CT not included in AAST criteria but important for triaging patients include active extravasation and pseudoaneurysm

From: Review of proximal splenic artery embolization in blunt abdominal trauma

 

Grade I

Grade II

Grade III

Grade IV

Grade V

Subcapsular hematoma extent

< 10% of surface area

10–50% of splenic surface area

> 50% of splenic surface area, ruptured subcapsular hematoma,

N/A

N/A

Laceration depth

< 1 cm

1-5 cm

>5 cm

N/A

N/A

Other

   

Laceration of vessels leading to > 25% devascularization

Shattered spleen, complete devascularization