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Table 4 KDIGO staging for AKI severity

From: Impact of amount of fluid for circulatory resuscitation on renal function in patients in shock: evaluating the influence of intra-abdominal pressure, renal resistive index, sublingual microcirculation and total body water measured by bio-impedance analysis on haemodynamic parameters for guidance of volume resuscitation in shock therapy: a protocol for the VoluKid pilot study–an observational clinical trial

Stage GFR/serum creatinine criteria Urine output criteria
Stage 1 1.5–1.9 times baseline
or
≥ 26.5 μmol/L increase within 48 h
< 0.5 mL/kg/h for 6–12 h
Stage 2 2–2.9 times baseline < 0.5 mL/kg/h ≥ 12 h
Stage 3 3 times baseline
or
Increase in serum creatinine to ≥ 354 μmol/L
or
Initiation of renal replacement therapy
< 0.3 mL/kg/h ≥ 24 h
Or
Anuria for ≥ 12 h
  1. KDIGO staging for severity of acute kidney injury defines AKI as any of the following: increase in serum creatinine by 26.5 μmol/L or more within 48 h or increase in serum creatinine to 1.5 times baseline or more within the last 7 days or urine output less than 0.5 mL/kg/h for 6 h
  2. The KDIGO has also recommended a staging system for the severity of the AKI, but KDIGO consensus classification has yet to be validated