Stage

Estimated clearance plasma creatinine

Diuresis

Risk

Reduced to >25%

<0.5 ml/kg/h since 8 h

Injury

Reduced to >50%

<0.5 ml/kg/h since 16 h

Failure

Reduced to >75% or <35/ml/min/1.73 m²

<0.3 ml/kg/h during 24 h or anuria since 12 h

Loss

Persisting failure >4 weeks

-

End stage

Persisting failure >3 months

-