Table 1 RIFLE (Risk, Injury, Failure, Loss, End-stage kidney disease) criteria for the definition of acute kidney injury

Risk

Increased serum creation × 1.5 or decreased of GFR >25%

Urine output <0.5 mL/kg/hr for 6 hrs

Injury

Increased serum creatinine × 2 or decrease of GFR >50%

Urine output <0.5 mL/kg/hr for 12 hrs

Failure

Increased serum creatine × 3 or decrease of GFR >75% or serum creatinine ≥ 4 mg/dL

Urine output <0.3 mL/kg/hr for 12 hrs or anuria for 12 hrs

Loss End-stage kidney disease