A 42-year-old woman with no prior renal disease develops acute kidney injury after receiving intravenous contrast for a coronary angiogram. Serum creatinine rises from 0.9 to 3.2 mg/dL within 72 hours. Urine osmolality is 350 mOsm/kg, and fractional excretion of sodium (FENa) is 2.8%. Which finding best distinguishes contrast-induced ATN from prerenal azotemia?

See the options, answer & explanation

Sign in free to reveal the answer choices, the correct answer, the detailed explanation, and AI-powered insights for this question.