Generalized Fatigue 2 Days in Medicine / Internal Medicine — 70yo Man | Nephrology | SMLE Q#18510
SMLE Question #18510
Medicine / Internal Medicine
Nephrology
Objective: OBJ-IM-NEPH-RENAL-AKI-02
Last updated: February 2026
A 70-year-old man presents to the Emergency Department with generalized fatigue 2 days after a contrast-enhanced CT brain scan performed for suspected transient ischemic attack. He reports reduced urine output since the scan. He has no dysuria, flank pain, rash, arthralgia, or recent NSAID or antibiotic use. Examination shows no peripheral edema and no clinical signs of hypovolemia; cardiopulmonary examination is normal. Which of the following best describes the mechanism for his renal impairment?
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