A 65-year-old man with hypertension and diabetes presents with acute onset oliguria and serum creatinine of 4.2 mg/dL (baseline 1.0 mg/dL). Urinalysis shows muddy brown casts. He took ibuprofen for back pain 2 days ago. Fractional excretion of sodium (FENa) is 0.3%. Which of the following is the most likely diagnosis?

  1. A)Postrenal acute kidney injury
  2. B)Acute glomerulonephritis
  3. C)Acute interstitial nephritis
  4. D)Acute tubular necrosis
  5. E)Prerenal acute kidney injuryGABARITO

Explicação

This patient has prerenal AKI. The low FENa (<1%) indicates intact renal tubular function with appropriate sodium reabsorption, suggesting volume depletion or decreased renal perfusion. NSAIDs reduce renal blood flow by inhibiting prostaglandins, and his basel... Ver explicação completa e trilha adaptativa →

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