AAST kidney injury scale (2018)
Nephrology and urology
Also known as: AAST-Klassifikation der Nierenverletzung (2018) · AAST böbrek yaralanma ölçeği (2018) · AAST kidney injury scale (2018 revision), grades I–V
What it is for
American Association for the Surgery of Trauma (AAST) grading of kidney injury, based mainly on contrast-enhanced CT (with excretory phase), operative or pathological findings. Vascular injury means pseudoaneurysm or arteriovenous fistula (AVF).
Classification
| Category | Description |
|---|---|
| Grade I | subcapsular haematoma and/or parenchymal contusion without laceration. |
| Grade II | perirenal haematoma confined to Gerota's fascia; parenchymal laceration ≤1 cm deep without urinary extravasation. |
| Grade III | parenchymal laceration >1 cm deep without collecting system rupture or urinary extravasation; or any injury with a vascular injury or active bleeding contained within Gerota's fascia. |
| Grade IV | laceration into the collecting system with urinary extravasation; renal pelvis laceration and/or complete ureteropelvic disruption; segmental renal artery or vein injury; active bleeding beyond Gerota's fascia into the retroperitoneum or peritoneum; segmental or complete kidney infarction from vessel thrombosis without active bleeding. |
| Grade V | main renal artery or vein laceration or avulsion of the hilum; devascularised kidney with active bleeding; shattered kidney with loss of identifiable parenchymal anatomy. |
Source
Organ injury scaling 2018 update: Spleen, liver, and kidney
AAST · J Trauma Acute Care Surg 2018;85:1119–1122 (Kozar RA et al.)
DOI: 10.1097/TA.0000000000002058
PMID: 30462622
- Edition
- AAST Organ Injury Scale 2018 update (kidney)
- Checked on
Summary of the published classification in our own words. Not a substitute for the original publication.
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