Classification of AKI

Stage 1: 1.5-1.9 times baseline serum creatinine, urine output of less than 0.5 ml/kg/h for 6-12 hours Stage 2: 2-2.9 times baseline serum creatinine, urine output of less than 0.5 ml/kg/h for 12 hours or greater Stage 3: 3times baseline serum creatinine, urine output of less than 0.3 ml/kg/h for 24 hours or greater or anuria for 12 hours or more