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Table 1 AAST-scale and modified scale for classification of spleen injuries.

From: No further incidence of sepsis after splenectomy for severe trauma: a multi-institutional experience of the trauma registry of the DGU with 1,630 patients

AAST Grade Injury Injury Description AIS-98* Grade
I hematoma
laceration
subcapsular, < 10% surface
capsular tear, < 1 cm
2
2
II hematoma
laceration
subcapsular, 10-50% surface; intraparenchymal hematoma, < 10 cm in diameter
1-3 cm deep, < 10 cm long
2
2
III hematoma
laceration
subcapsular, > 50% surface; intraparenchymal hematoma, > 10 cm
> 3 cm parenchymal
3
3
IV laceration parenchymal disruption involving 25-75% of spleen 4
V laceration
vascular
parenchymal disruption involving > 75% of spleen
splenic venous injuries
5
5
VI vascular splenic avulsion 6
  1. *Note-AIS-98 = Abbreviated Injury Scale, 1998 version.