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AKI Staging — ESENeph MCQ

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EasyAcute Kidney InjuryAKI StagingESENeph

A 72-year-old man is admitted with community-acquired pneumonia. His baseline creatinine is 90 umol/L. On admission, creatinine is 210 umol/L, urine output 15 mL/hr. He is volume depleted. After 48 hours of IV fluid resuscitation, creatinine rises to 280 umol/L. What is the KDIGO AKI stage?

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Correct answer: A — Stage 3

Creatinine has risen more than 3-fold from baseline (280/90 = 3.1x), which meets the KDIGO criteria for AKI Stage 3 (≥3.0 times baseline). Stage 1 is 1.5-1.9x or ≥26.5 umol/L rise within 48h; Stage 2 is 2.0-2.9x baseline.

Reference: KDIGO 2012 – Clinical Practice Guideline for Acute Kidney Injury