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Table 1 Definition and staging of acute kidney injury: KDIGO criteria

From: Practical approach to detection and management of acute kidney injury in critically ill patient

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/min for ≥ 24 h
OR
Anuria ≥ 12 h