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Classification of AKI by serum creatinine

  • Stage I - 150% increase in serum creatinine
  • Stage II - 200% increase in serum creatinine
  • Stage III - 300% increase in serum creatinine

Classification of AKI by urine output

  • Stage I - <0.5mL/kg/h for 6-12 hours
  • Stage II - <0.5mL/kg/h for more than 12 hours
  • Stage III - <0.3mL/kg/h for at least 24 hours OR anuria for more than 12 hours

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