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CMSA FC Path(SA) Chemical Pathology Practice Questions - Fellowship Of The College Of Pathologists Of South Africa - Chemical Pathology Exam

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A patient with ethylene glycol poisoning has serum sodium 140 mmol/L, glucose 5 mmol/L, urea 6 mmol/L, and measured serum osmolality 360 mOsm/kg. Estimated osmolality (2×Na + glucose + urea) is 292 mOsm/kg. What is the osmolal gap in mOsm/kg?
Correct Answer:
68

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