Classification/staging system for AKI according to AKIN15
| AKI stage | Serum creatine criteria | Urine output criteria |
|---|---|---|
| AKI stage 1 | Increase in serum creatine ≥0.3 mg/dl or increase to ≥150%–200% from baseline | Urine output<0.5 ml/kg/h for >6 h |
| AKI stage 2 | Increase of serum creatine to >200%–300% from baseline | Urine output<0.5 ml/kg/h for >12 h |
| AKI stage 3 | Increase of serum creatine to >300% from baseline OR serum creatine ≥4.0 mg/dl after a rise of at least 0.5 mg/dl OR treatment with renal replacement therapy | Urine output<0.3 ml/kg/h for 24 h OR anuria for 12 h |
AKI, acute kidney injury; AKIN, acute kidney injury network.