From: Acute kidney injury in major abdominal surgery: incidence, risk factors, pathogenesis and outcomes
Class/stage | SCr/GFR | UO | ||||
---|---|---|---|---|---|---|
RIFLE | AKIN | KDIGO | RIFLE | AKIN | KDIGO | |
Risk/1a | ↑ SCr X 1.5 or ↓ GFR > 25% | ↑ SCr ≥ 26.5 μmol/l (≥ 0.3 mg/dl) or ↑ SCr ≥ 150–200% (1.5–2X) | ↑ SCr ≥ 26.5 μmol/l (≥ 0.3 mg/dl) or ↑ SCr ≥ 150–200% (1.5–2X) | <0.5 ml/kg/h (> 6 h) | <0.5 ml/kg/h (> 6 h) | <0.5 ml/kg/h (> 6 h) |
Injury/2a | ↑ SCr X 2 or ↓ GFR > 50% | ↑ SCr > 200–300% (> 2–3X) | ↑ SCr > 200–300% (> 2–3X) | <0.5 ml/kg/h (> 12 h) | <0.5 ml/kg/h (> 12 h) | <0.5 ml/kg/h (> 12 h) |
Failure/3a | ↑ SCr X 3 or ↓ GFR > 75% or if baseline SCr ≥ 353.6 μmol/l (≥ 4 mg/dl) ↑ SCr > 44.2 μmol/l (> 0.5 mg/dl) | ↑ SCr > 300% (> 3X) or if baseline SCr ≥ 353.6 μmol/l (≥ 4 mg/dl) ↑SCr ≥ 44.2 μmol/l (≥ 0.5 mg/dl) or initiation of renal replacement therapy | ↑ SCr > 300% (> 3X) or ↑SCr to ≥ 353.6 μmol/l (≥ 4 mg/dl) or initiation of renal replacement therapy | <0.3 ml/kg/h (> 24 h) or anuria (> 12 h) | <0.3 ml/kg/h (24 h) or anuria (12 h) | <0.3 ml/kg/h (24 h) or anuria (12 h) |