Table 1.

Acute Kidney Injury Network criteria

Stage	Serum creatinine criteria	Urine output criteria
1	Increase to ≥26.5 µmol/L (≥0.3 mg/dL) OR increase of ≥150% to 200% (1.5× to 2×)	<0.5 mL/kg/h for >6 h
2	Increase of >200% to 300% (>2× to 3×)	<0.5 mL/kg/h for >12 h
3a	Increase of >300% (>3×) OR baseline concentration of ≥353.6 µmol/L (≥4.0 mg/dL)Increase to ≥44.2 µmol/L (≥0.5 mg/dL)	<0.3 mL/kg/h for >24 h OR anuria for >12 h

^aStage 3 also includes patients requiring renal replacement therapy independent of the stage