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| AKI stage | Serum creatinine (SCr) | Urine output |
| 1 |
1.5-1.9 times baseline OR > 0.3 mg/dL increase |
< 0.5 mL/kg/h for 6-12 hours |
| 2 | 2.0–2.9 times baseline | < 0.5 mL/kg/h for > 12 hours |
| 3 |
3.0 Times baseline OR Increase in SCr to > 4.0 mg/dL OR Initiation of RRT OR Decrease in eGFR to < 35 mL/min/1.73 m2 in patients < 18 years |
< 0.3 mL/kg/h for >24 hours OR Anuria for > 12 hours |
