A 49-year-old man is managed in hospital for multiple comorbidities. He has had intractable epistaxis for the past three days. Vitals are normal. Blood urea nitrogen is 120 mg/dL. Creatinine is 4.5 mg/dL. Which of the following is most likely to be seen in this patient?
Bicarbonate of 23 mEq/L
Calcium of 10.4 mg/dL
Hyperfiltration
Potassium of 5.2 mEq/L
Urine specific gravity of 1.000