Grading

Grading system is done referring to CT scan results  according to the American Association for the Surgery of Trauma (AAST) Organ Injury Scale. as follows:

Grade 1

Hematoma, subcapsular, less than 10% surface area

Laceration, capsular tear, less than 1 cm parenchymal depth

Grade 2

Hematoma, subcapsular, 10% to 50% surface area

Intraparenchymal, less than 5 cm in diameter

Laceration, capsular tear, 1 cm to 3 cm parenchyma depth that does not involve a trabecular vessel

Grade 3

Hematoma, subcapsular, more than 50% surface area expanding; ruptured subcapsular or parenchymal hematoma; intraparenchymal hematoma 5 cm or greater and expanding.

Laceration, greater than 3 cm parenchymal depth or involving trabecular vessels

 Grade 4

Laceration involving segmental or hilar vessels producing major devascularization  (more than 25% of spleen)

Grade 5

Laceration, completely shattered spleen

Vascular, Hilar vascular injury that devascularizes the spleen.