Table 1 American Association for the Surgery of Trauma (AAST) classification of renal trauma
From: MDCT of blunt renal trauma: imaging findings and therapeutic implications
Grade | Type | Description |
|---|---|---|
I | Parenchyma Haematoma | Microscopic or gross haematuria with normal urologic studies (contusion) Non-expanding subcapsular haematoma |
II | Parenchyma Haematoma | Laceration <1 cm in depth, without collecting system rupture Non-expanding perirenal haematoma confined to retroperitoneum |
III | Parenchyma | Laceration >1 cm in depth without collecting system rupture |
IV | Parenchyma Vascular | Laceration with collecting system rupture Main renal artery/vein injury with contained haemorrhage |
V | Parenchyma Vascular | Shattered kidney Avulsion of renal hilum that devascularises kidney |