Splenic injury grading

Source:http://radiopaedia.org/articles/splenic_injury_grading
American Association for the Surgery of Trauma (AAST)

Grade I

* Subcapsular haematoma < 10% of surface area
* Capsular laceration < 1 cm depth

Grade II

* Subcapsular haematoma 10 - 50% of surface area
* Intraparenchymal haematoma < 5 cm in diameter
* Laceration 1 - 3 cm depth not involving trabecular vessels

Grade III

* Subcapsular haematoma > 50% of surface area or expanding
* Intraparenchymal haematoma > 5 cm or expanding
* Laceration > 3 cm depth or involving trabecular vessels
* Ruptured subcapsular or parenchymal haematoma

Grade IV

* Laceration involving segmental or hilar vessels with major devascularization (> 25% of spleen)

Grade V

* Shattered spleen
* Hilar vascular injury with devascularised spleen