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AKI Staging Recovery Phase — ESENeph MCQ

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EasyAcute Kidney InjuryAKI Staging Recovery PhaseESENeph

A 74-year-old man is admitted with sepsis from a urinary source. His creatinine rises from 100 to 165 umol/L in 36 hours. Urine output has been 25 mL/hr. He is resuscitated with IV fluids and antibiotics. At 48 hours his creatinine is 170 umol/L but urine output is now 45 mL/hr. What is the AKI stage at 48 hours?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: B — Stage 1

Creatinine has risen by 70 umol/L within 48 hours (≥26.5 umol/L rise qualifies for Stage 1) and is 1.7x baseline (Stage 1 = 1.5-1.9x). Urine output is now >0.5 mL/kg/hr so the urine criterion no longer applies. The creatinine criterion determines Stage 1. Despite clinical improvement, AKI staging captures the peak severity reached.

Reference: KDIGO 2012 – AKI Guideline