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Table 1 Staging of AKI (KDIGO)

From: AKI after pediatric cardiac surgery for congenital heart diseases–recent developments in diagnostic criteria and early diagnosis by biomarkers-

Stage Serum creatinine Urine output
1 1.5–1.9 times baseline or ≥0.3 mg/dl (≥26.5 μmol/l) increase <0.5 ml/kg/h for 6–12 h
2 2.0–2.9 times baseline <0.5 ml/kg/h for ≥12 h
3 3.0 times baseline or increase in serum creatinine to ≥4.0 mg/dl (≥353.6 μmol/l) or initiation of renal replacement therapy or in patients <18 years, decrease in eGFR to <35 ml/min per 1.73 m2 <0.3 ml/kg/h for ≥24 h or anuria for ≥12 h
  1. Reference [12]