Table 2.

Acute Dialysis Quality Initiative (ADQI) AKI diagnostic criteria (RIFLE classification).

Crit Care. 2004;8:R204-12. (DOI 10.1186/cc2872) ©Bellomo R, et al.; licensee BioMed Central Ltd. 2004. http://ccforum.com/content/8/4/R204

	Diagnostic criteria based on serum Cr or GFR	Diagnostic criteria based on urine output (UO)
Risk	Increased serum Cr ≥ 1.5-fold the normal value, or GFR decrease > 25% normal value	UO < 0.5 mL/kg/h for 6 hours
Injury	Increased serum Cr ≥ 2-fold the normal value, or GFR decrease > 50% normal value	UO < 0.5 mL/kg/h for 12 hours
Failure	Increased serum Cr ≥ 3-fold the normal value, GFR decrease > 75% normal value, or serum Cr ≥ 4 mg/dL with acute rise ≥ 0.5 mg/dL	UO < 0.3 mL/kg/h for 24 h, or anuria for 12 hours
Loss	Need for renal replacement therapy for 4 weeks
ESRD	Need for dialysis for longer than 3 months