Table 1.

Organ injury scale for the spleen, according to the AAST

AAST grade	Splenic injuries
I	Hematoma: subcapsular, <10 % of surface area
	Laceration: capsular tear, <1 cm of parenchymal depth
II	Hematoma: subcapsular, 10–50 % of surface area
	Intraparenchymal hematoma, <5 cm in diameter
	Laceration 1–3 cm in parenchymal depth not involving a parenchymal vessel
III	Hematoma: subcapsular, >50 % of surface area or expanding
	Ruptured subcapsular or parenchymal hematoma
	Intraparenchymal hematoma, >5 cm in diameter
	Laceration of >3 cm parenchymal depth or involving trabecular vessels
IV	Laceration of segmental or hilar vessels producing major devascularization (>25 % of spleen)
V	Completely shattered spleen
	Vascular hilar injury that devascularized spleen

Advance one grade for multiple injuries to same organ up to grade III