Acute Kidney Injury AKI Staging (KDIGO) — free guideline decision tool
This tool stages acute kidney injury by the KDIGO criteria using baseline/current creatinine, urine output, and RRT status, and gives management principles.
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.
| Baseline creatinine | 70 μmol/L |
|---|---|
| Current creatinine | 140 μmol/L |
| Urine output | Normal/not assessed |
| Renal replacement therapy (RRT) started | Yes |
→StageAKI Stage 3
- Creatinine assessment：SCr 2.0× baseline; RRT started → Stage 3
- Urine output assessment：not assessed/normal
- Take the higher：Final stage is the higher of creatinine and urine output = Stage 3
Common questions
What is Acute Kidney Injury AKI Staging (KDIGO)?
This tool stages acute kidney injury by the KDIGO criteria using baseline/current creatinine, urine output, and RRT status, and gives management principles.
How is Acute Kidney Injury AKI Staging (KDIGO) calculated? What is the core formula?
Stage 1: SCr 1.5–1.9× or rise ≥ 26.5 μmol/L, UO < 0.5 × 6–12 h. Stage 2: SCr 2.0–2.9×, UO < 0.5 × ≥ 12 h. Stage 3: SCr ≥ 3.0× or ≥ 353.6 μmol/L or RRT, UO < 0.3 × ≥ 24 h or anuria ≥ 12 h. Stage = max(creatinine, urine output).
When is Acute Kidney Injury AKI Staging (KDIGO) used?
Use to assign an AKI stage (taking the higher of the creatinine and urine-output criteria) and to anchor the management approach.
What are the key clinical points for Acute Kidney Injury AKI Staging (KDIGO)?
The final stage takes the higher of the creatinine and urine-output criteria, and starting RRT automatically defines Stage 3. (original synthesis · not guideline verbatim) The urine-output criterion is applied cautiously with diuretics or cirrhotic ascites. Management centers on stopping nephrotoxins, optimizing hemodynamics, and identifying prerenal/renal/postrenal causes.
What are the limits and cautions when using Acute Kidney Injury AKI Staging (KDIGO)?
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.
How is Acute Kidney Injury AKI Staging (KDIGO) calculated in practice? Can you show a worked example?
Inputs: Baseline creatinine 70 μmol/L, Current creatinine 140 μmol/L, Urine output Normal/not assessed, Renal replacement therapy (RRT) started Yes → Result: Stage AKI Stage 3（Creatinine assessment: SCr 2.0× baseline; RRT started → Stage 3, Urine output assessment: not assessed/normal, Take the higher: Final stage is the higher of creatinine and urine output = Stage 3）
Run Acute Kidney Injury AKI Staging (KDIGO) now
This tool stages acute kidney injury by the KDIGO criteria using baseline/current creatinine, urine output, and RRT status, and gives management principles.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
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