Acute Kidney Injury USMLE Step 1 Practice Question
A 68 year old woman is admitted for vomiting and profuse diarrhea for 3 days. She is dizzy on standing and has dry mucous membranes. BUN is 46 mg/dL and creatinine is 1.6 mg/dL. Urine sodium is low and urine osmolality is high. Which of the following is the most likely explanation for her renal findings?
Answer choices
- ADecreased renal perfusion with intact tubular reabsorptionCorrect answer
- BImmune mediated inflammation of the interstitium
- CObstruction of urinary flow causing hydronephrosis
- DDestruction of podocytes causing heavy proteinuria
- ETubular epithelial necrosis with loss of concentrating ability
- FSyndrome of inappropriate antidiuretic hormone with dilutional hyponatremia
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