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Definition and classification/staging system for acute kidney injury (AKI)*. |
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| AKI stage |
Creatinine criteria |
Urine output criteria |
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| AKI stage I |
Increase of serum creatinine by ≥ 0.3 mg/dl (≥ 26.4 μmol/L) or increase to ≥ 150% – 200% from baseline |
Urine output < 0.5 ml/kg/hour for > 6 hours |
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| AKI stage II |
Increase of serum creatinine to > 200% – 300% from baseline |
Urine output < 0.5 ml/kg/hour for > 12 hours |
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| AKI stage III |
Increase of serum creatinine to > 300% from baseline or serum creatinine ≥ 4.0 mg/dl (≥ 354 μmol/L) after a rise of at least 44 μmol/L or treatment with renal replacement therapy |
Urine output < 0.3 ml/kg/hour for > 24 hours or anuria for 12 hours |
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Diagnostic criteria for AKI includes an abrupt (within 48 hours) reduction in kidney function defined as an absolute increase in serum creatinine of either 0.3 mg/dl or more (≥ 26.4 μmol/L) or a percentage increase of 50% or more (1.5 fold from baseline) or a reduction in urine output. *according to Mehta and colleagues [3] | ||
Ostermann et al. Critical Care 2008 12:R144 doi:10.1186/cc7123 |
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