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Classification/staging system for acute kidney injury [13] modified from the Risk, Injury, Failure, Loss of Kidney Function, End-stage Kidney Disease criteria [2] |
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| Stage |
Serum creatinine criteria |
Urine output criteria |
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| 1 |
Increase in serum creatinine ≥0.3 mg/dl (≥26.4 μmol/l) or increase to ≥150% to 200% (1.5-fold to 2-fold) from baseline |
< 0.5 ml/kg/hour for > 6 hours |
| 2 |
Increase in serum creatinine to > 200% to 300% (> 2-fold to 3-fold) from baseline |
< 0.5 ml/kg/hour for > 12 hours |
| 3a |
Increase in serum creatinine to > 300% (> 3-fold) from baseline, or serum creatinine ≥4.0 mg/dl (≥354 μmol/l) with an acute increase of at least 0.5 mg/dl (44 μmol/l) |
< 0.3 ml/kg/hour for 24 hours, or anuria for 12 hours |
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Acute kidney injury is defined as an abrupt (within 48 hours) reduction in kidney function, currently defined as an absolute increase in serum creatinine ≥0.3 mg/dl (≥26.4 μmol/l), a percentage increase in serum creatinine ≥50% (1.5-fold from baseline), or a reduction in urine output (documented oliguria < 0.5 ml/kg/hour for > 6 hours). aIndividuals who receive renal replacement therapy are considered to have met the criteria of Stage 3 irrespective of the stage they are in at the time of renal replacement therapy. | ||
Lopes et al. Critical Care 2008 12:R110 doi:10.1186/cc6997 |
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