What are the diagnostic criteria for acute kidney injury?

Jun 04, 2019 Source: Cainiu Health

Dr. Yuan Xiaoying

Introduction

I. Serum creatinine increases by ≥0.3 mg/dL (≥26.5 µmol/L) within 48 hours. II. An increase in serum creatinine of ≥50% from baseline is confirmed or presumed to have occurred within 7 days. III. Marked reduction in urine output—defined as urine output <0.5 mL/kg/hour for ≥6 consecutive hours.

The diagnosis of acute kidney injury (AKI) requires integration of clinical presentation, laboratory tests, and imaging studies. However, standardized clinical diagnostic criteria for AKI remain inconsistent. According to the most recent Clinical Practice Guideline for AKI established by the Kidney Disease: Improving Global Outcomes (KDIGO) initiative, AKI may be diagnosed if any one of the following criteria is met:

What are the diagnostic criteria for acute kidney injury?.jpeg

1. Serum creatinine increases by ≥0.3 mg/dL (≥26.5 µmol/L) within 48 hours.

2. Serum creatinine increases by ≥50% (i.e., to ≥1.5-fold baseline) within seven days, either confirmed or presumed; or
3. Urine output decreases significantly—to <0.5 mL/kg/h—for a duration of ≥6 hours.

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