Splenic injury scale as devised by the Organ Injury Scaling Committee of the American Association for the surgery of trauma13
| Grade | Injury | Injury description |
|---|---|---|
| I | Haematoma | Subcapsular, non-expanding <10% surface area |
| Laceration | Capsular tear, non-bleeding, with <1 cm deep parenchymal disruption | |
| II | Haematoma | Subcapsular, non-expanding, 10%–50% surface area, intraparenchymal non-expanding <2 cm in diameter |
| Laceration | Capsular tear, actively bleeding; parenchymal laceration 1–3 cm deep that does not involve a major or trabecular vessel | |
| III | Haematoma | Subcapsular, >50% surface area or expanding; ruptured subcapsular haematoma with active bleeding; intraparenchymal haematoma >2 cm or expanding |
| Laceration | Laceration >3 cm deep or involving trabecular vessels but not involving the hilar vessels | |
| IV | Haematoma | Ruptured intraparenchymal haematoma with active bleeding |
| Laceration | Laceration involving segmental or hilar vessels producing major devascularisation (>25% of spleen) | |
| V | Laceration | Completely shattered spleen |
| Vascular | Hilar vascular injury that devascularises spleen |