Acid-Base Disorders USMLE Step 1 Practice Question
A 52-year-old man is brought to the emergency department after being found confused in his garage. He has nausea and flank pain. Laboratory studies show high anion gap metabolic acidosis, elevated osmolar gap, hypocalcemia, and numerous envelope-shaped crystals in the urine. Which of the following is the most likely cause of this patient's findings?
Answer choices
- AAspirin overdose
- BDiarrhea
- CMethanol ingestion
- DDistal renal tubular acidosis
- EEthylene glycol ingestionCorrect answer
- FIsoniazid overdose
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