🧫 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.
Acute Kidney Injury AKI Staging (KDIGO)
Baseline creatinine (μmol/L)
Current creatinine (μmol/L)
Urine output
Renal replacement therapy (RRT) started
When to use
Use to assign an AKI stage (taking the higher of the creatinine and urine-output criteria) and to anchor the management approach.
How it works
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).
Key points
- 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.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.