Renal injury: AAST grade IV
Multiple traumatic injuries.
Grade IV renal injury
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Right renal laceration extends to renal pelvis is seen.
There is a small contrast blush at the mid pole posteromedially raising the possibility of active bleeding.
Large perinephric haematoma surrounds the kidney and the ureter.
Right renal laceration (AAST Grade IV injury) as described above with active bleeding, and evidence of extravasation from the collecting system.
The AAST (American Association for the Surgery of Trauma) renal injury scale is the most widely used renal trauma grading system. Severity is assessed according to the depth of renal parenchymal damage and involvement of the urinary collecting system and renal vessels.
- laceration extends to renal pelvis or urinary extravasation
- vascular: injury to main renal artery or vein with contained haemorrhage
- segmental infarctions without associated lacerations
- expanding subcapsular haematomas compressing the kidney
- Moore EE, Shackford SR, Pachter HL et-al. Organ injury scaling: spleen, liver, and kidney. J Trauma. 1990;29 (12): 1664-6. Pubmed citation