Toxicology USMLE Step 1 Practice Question
A 52-year-old man is found confused in his garage beside an open antifreeze container. He presents with flank pain, oliguria, and altered mental status. Vital signs show BP 128/82, HR 102, RR 20, temperature 37.2°C, and SpO2 98% on room air. Urinalysis reveals envelope-shaped calcium oxalate crystals and hematuria. Serum creatinine is 3.2 mg/dL. He denies recent acetaminophen use. Which toxic metabolite is primarily responsible for his acute kidney injury?
Answer choices
- ANAPQI
- BAcetaldehyde
- CCyanide ion
- DFormic acid
- EOxalic acidCorrect answer
- FEthylene glycol
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