Table 1 RIFLE classificationa
RIFLE class | GFR criteria | UO criteria |
|---|---|---|
Risk | Increase in serum creatinine ≥1.5 × baseline or decrease in GFR ≥25% | <0.5 ml/kg/hour for ≥6 hours |
Injury | Increase in serum creatinine ≥2 × baseline or decrease in GFR ≥ 50% | <0.5 ml/kg/hour for ≥12 hours |
Failure | Increase in serum creatinine ≥3 × baseline or decrease in GFR ≥75% or serum creatinine ≥350 μmol/L with an acute rise of at least 44 μmol/L | <0.3 ml/kg/hour for ≥24 hours or anuria ≥12 hours |
Loss | Complete loss of kidney function >4 weeks | |
End-stage kidney disease | Need for RRT >3 months | |