Acute Kidney Injury USMLE Step 1 Practice Question
A 71 year old man is admitted for septic shock due to pneumonia. He remains hypotensive for several hours despite fluid resuscitation. Two days later his serum creatinine rises sharply. Urinalysis shows muddy brown granular casts. Fractional excretion of sodium is elevated. Which of the following is the most likely cause of his acute kidney injury?
Answer choices
- AAcute tubular necrosisCorrect answer
- BAcute interstitial nephritis
- CPrerenal azotemia
- DPostrenal obstruction
- ERapidly progressive glomerulonephritis
- FHepatorenal syndrome
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