Renal and Urinary: Glomerulonephritis, AKI · USMLE Step 1

A patient develops AKI after receiving IV contrast. Which biochemical change is expected?

  1. Increased BUN/creatinine ratio
  2. Increased fractional excretion of sodium
  3. Increased creatinine
  4. Increased urine osmolality
Show answer and explanation

Correct answer: Increased creatinine

Contrast-induced nephropathy is an intrinsic AKI marked by a rising serum creatinine; intense renal vasoconstriction typically produces a low FeNa (<1%) and a normal BUN/creatinine ratio.

Difficulty: Medium Question 13 of 20

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