Kidney Injury Scale (AAST 2018) — free guideline decision tool
Point-and-click CT findings give the AAST 2018 kidney grade I–V (including vascular injury and active bleeding criteria) and a report sentence. Instant, browser-side.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Hematoma / contusion | Subcapsular hematoma and/or contusion without laceration |
|---|---|
| Parenchymal laceration | >1 cm, no collecting system rupture or extravasation |
| Renal pelvis / ureter | None |
| Vascular injury / active bleeding | Segmental renal artery or vein injury |
| Bilateral injury | No |
→AAST kidney gradeGrade IV
- Grade logic：Highest single finding grade IV
- Management cue：High grade: consider angioembolization or surgery if unstable or bleeding; urinary extravasation needs excretory-phase follow-up and possibly stenting.
- Report sentence：Renal injury, AAST 2018 organ injury scale grade IV.
| Hematoma / contusion | Perirenal hematoma confined to Gerota fascia |
|---|---|
| Parenchymal laceration | Shattered kidney, loss of identifiable anatomy |
| Renal pelvis / ureter | Renal pelvis laceration and/or complete UPJ disruption |
| Vascular injury / active bleeding | Devascularized kidney with active bleeding |
| Bilateral injury | Yes |
→AAST kidney gradeGrade V
- Grade logic：Highest single finding grade V
- Management cue：High grade: consider angioembolization or surgery if unstable or bleeding; urinary extravasation needs excretory-phase follow-up and possibly stenting.
- Report sentence：Renal injury, AAST 2018 organ injury scale grade V.
Common questions
What is Kidney Injury Scale (AAST 2018)?
Point-and-click CT findings give the AAST 2018 kidney grade I–V (including vascular injury and active bleeding criteria) and a report sentence. Instant, browser-side.
How is Kidney Injury Scale (AAST 2018) calculated? What is the core formula?
Each finding maps to a grade; take the highest; bilateral injury advances one grade up to III.
When is Kidney Injury Scale (AAST 2018) used?
Abdominal trauma CT reports, alongside the AAST liver and spleen tools.
What are the key clinical points for Kidney Injury Scale (AAST 2018)?
Take the highest grade. Bilateral: +1 up to III. Bleeding inside vs beyond Gerota: III vs IV. Urinary extravasation = grade IV.
What are the limits and cautions when using Kidney Injury Scale (AAST 2018)?
For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
Does Kidney Injury Scale (AAST 2018) upload patient data? Where is it calculated?
Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
How is Kidney Injury Scale (AAST 2018) calculated in practice? Can you show a worked example?
Inputs: Hematoma / contusion Subcapsular hematoma and/or contusion without laceration, Parenchymal laceration >1 cm, no collecting system rupture or extravasation, Renal pelvis / ureter None, Vascular injury / active bleeding Segmental renal artery or vein injury, Bilateral injury No → Result: AAST kidney grade Grade IV（Grade logic: Highest single finding grade IV, Management cue: High grade: consider angioembolization or surgery if unstable or bleeding; urinary extravasation needs excretory-phase follow-up and possibly stenting., Report sentence: Renal injury, AAST 2018 organ injury scale grade IV.） Inputs: Hematoma / contusion Perirenal hematoma confined to Gerota fascia, Parenchymal laceration Shattered kidney, loss of identifiable anatomy, Renal pelvis / ureter Renal pelvis laceration and/or complete UPJ disruption, Vascular injury / active bleeding Devascularized kidney with active bleeding, Bilateral injury Yes → Result: AAST kidney grade Grade V（Grade logic: Highest single finding grade V, Management cue: High grade: consider angioembolization or surgery if unstable or bleeding; urinary extravasation needs excretory-phase follow-up and possibly stenting., Report sentence: Renal injury, AAST 2018 organ injury scale grade V.）
Run Kidney Injury Scale (AAST 2018) now
Point-and-click CT findings give the AAST 2018 kidney grade I–V (including vascular injury and active bleeding criteria) and a report sentence. Instant, browser-side.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
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