Table 1 Measurements used to define and stage AKI

AKI

\(\ge\) 0.3 mg/dl (\(\ge\) 26.5 µmol/l) increase within 48 hours, or \(\ge\) 1.5 times baseline, which is known or presumed to have occurred within the prior 7 days

<0.5 ml/kg/h for 6 hours

Stage 1

1.5-1.9 times baseline, or \(\ge\) 0.3 mg/dl (26.5 µmol/l) increase

<0.5 ml/kg/h for 6-12 hours

Stage 2

2.0-2.9 times baseline

<0.5 ml/kg/h for \(\ge\) 12 hours

Stage 3

\(\ge\) 3.0 times baseline, or increase in creatinine to \(\ge\) 4.0 mg/dl (353.6 µmol/l)

<0.3 ml/kg/h for \(\ge\) 24 hours, or anuria for \(\ge\) 12 hours