AAST kidney injury scale

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Renal trauma grading is often done using the American Association for the Surgery of Trauma (AAST) ^3-4 according to depth of damage and involvement of the urinary collecting system and renal vessels:

grade I: contusion or non enlarging subcapsular haematoma, but no laceration
grade II: superfical laceration <1cm depth and does not involve the collecting system; non expanding perirenal haematoma
grade III: laceration >1cm, without extension into the renal pelvis or collecting system and with no evidence of urine extravasation
grade IV
- laceration extends to renal pelvis or urinary ~~extravasation~~extra-vasation
- vascular: injury to main renal artery or vein with contained haemorrhage
grade V
- shattered kidney
- avulsion of renal hilum: devascularisation of kidney due to hilar injury

Image 6 CT (renal excretory phase) ( create )

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AAST kidney injury scale

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Image 6 CT (renal excretory phase) ( create )

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