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Table 3 Traditionally used American Association for the Surgery of Trauma (AAST) scoring system for splenic injuries

From: Splenic artery embolization: technically feasible but not necessarily advantageous

Grade

Hematoma

Laceration

I

Subcapsular < 10 % of surface area

Capsular tear < 1 cm deep into parenchyma

II

Subcapsular 10–50 % of surface area

Capsular tear 1–3 cm deep into parenchyma NO involvement of trabecular vessels

III

Subcapsular > 50 % of surface area

OR

Expanding, ruptured subcapsular or parenchymal hematoma

OR

Intraparenchymal hematoma > 5 cm or expanding

>3 cm deep into parenchyma or trabecular vessel involvement

IV

 

Segmental or hilar vessel involvement with major devascularization (>25 %) of spleen

V

Shattered spleen

Hilar vascular injury that devascularizes spleen