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| style="height:100px; width:100px; text-align:left;" | A
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Revision as of 17:32, 27 February 2021

AAST Renal Injury Scale

Grade Description Image CT Example
I
  • Contusion
    • Microscopic or gross hematuria. Urological studies normal.
  • Hematoma
    • Subcapsular, non-expanding without parenchymal laceration.

Grade I

Grade I

II
  • Hematoma
    • Non-expanding peri-renal hematoma confined to renal retroperitoneum.
  • Laceration
    • <1.0 cm parenchymal depth of renal cortex without urinary extravasation.

Grade II

Grade II

III
  • Laceration
    • >1.0 cm parenchymal depth of renal cortex without collecting system rupture or urinary extravasation.

Grade III

Grade III

IV
  • Laceration
    • Parenchymal laceration extending through renal cortex, medulla, and collecting system.
  • Vascular
    • Main renal artery or vein injury with contained hemorrhage.

Grade IV

Grade IV

V
  • Laceration
    • Completely shattered kidney.
  • Vascular
    • Avulsion of renal hilum that devascularises kidney.

Grade V

Grade V

A B C
D E F
G H I