Electrolyte Disorders USMLE Step 1 Practice Question
A 47-year-old woman with Crohn disease has had months of watery diarrhea. She now complains of weakness and lightheadedness. Laboratory studies show sodium 138 mEq/L, potassium 2.8 mEq/L, chloride 114 mEq/L, bicarbonate 15 mEq/L, and creatinine 1.0 mg/dL. Which of the following acid-base and electrolyte abnormalities is most likely present?
Answer choices
- ARespiratory acidosis with hypernatremia
- BMetabolic alkalosis with hypochloremia
- CRespiratory alkalosis with hypocalcemia
- DNormal anion gap metabolic acidosis with hypokalemiaCorrect answer
- EHigh anion gap metabolic acidosis with hyperkalemia
- FMetabolic alkalosis with hyperkalemia
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