Grade I | Hematoma: subcapsular, <10 percent of surface area. Laceration: capsular tear <1 cm in depth into the parenchyma |
Grade II | Hematoma: subcapsular, 10 to 50% of surface area. Laceration: capsular tear, 1 to 3 cm in depth, but not involving a trabecular vessel |
Grade III | Hematoma: subcapsular, > 50% of surface area or expanding, ruptured subcapsular or parenchymal hematoma or intraparenchymal hematoma > 5 cm or expanding. Laceration: > 3 cm in depth or involving a trabecular vessel |
Grade IV | Laceration involving segmental or hilar vessels with major devascularization (i.e., > 25 percent of spleen) |
Grade V | Hematoma: shattered spleen. Laceration: hilar vascular injury which devascularizes spleen |
Reproduced from Tinkoff, G., Esposito, T. J., Reed, J., Kilgo, P., Fildes, J., Pasquale, M., & Meredith, J. W. (2008). American Association for the Surgery of Trauma Organ Injury Scale I: spleen, liver, and kidney, validation based on the National Trauma Data Bank. Journal of the American College of Surgeons, 207(5), 646-655. |