AAST Splenic Injury Scale 2018

Classification

Description

Notes

Grade 1

– Subcapsular hematoma <10% surface area

– Parenchymal laceration <1 cm depth

– Capsular tear

Grade 2

–Hematoma: Subcapsular, 10-50% surface area

– Subcapsular hematoma 10–50% surface area; intraparenchymal hematoma <5 cm

– Parenchymal laceration 1–3 cm

Grade 3

– Subcapsular hematoma >50% surface area; ruptured subcapsular or intraparenchymal hematoma ≥5 cm

– Parenchymal laceration >3 cm depth

Grade 4

– Any injury in the presence of a splenic vascular injury or active bleeding confined within splenic capsule

– Parenchymal laceration involving segmental or hilar vessels producing >25% devascularization

Grade 5

– Any injury in the presence of splenic vascular injury with active bleeding extending beyond the spleen into the peritoneum