Table 5.

Acute kidney injury (modified RIFLE classification)

Change in serum creatinine (up to 72 h) compared with baseline
Stage 1 Increase in serum creatinine to 150–200% (1.5–2.0 × increase compared with baseline) or increase of ≥0.3 mg/dL (≥26.4 µmol/L)
Stage 2 Increase in serum creatinine to 200–300% (2.0–3.0 × increase compared with baseline) or increase between >0.3 mg/dL (>26.4 µmol/L) and <4.0 mg/dL (<354 µmol/L)
Stage 3a Increase in serum creatinine to ≥300% (>3 × increase compared with baseline) or serum creatinine of ≥4.0 mg/dL (≥354 µmol/L) with an acute increase of at least 0.5 mg/dL (44 µmol/L)

^aPatients receiving renal replacement therapy are considered to meet Stage 3 criteria irrespective of other criteria.