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Retired NBME 25 Answers

nbme25/Block 1/Question#46 (reveal difficulty score)
A 1-month-old male newborn is brought to the ...
132, 3.2, 90, 37 ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
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submitted by โˆ—shak360(20)
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One way to have answered this question, if you didn't have the ion values memorized for metabolic alkalosis caused by vomiting is to remember what happens in BULIMIA NERVOSA.

Bulimia nervosa consists of recurring episodes of binge eating with compensatory purging behaviors at least weekly over 3 months. The electrolyte disturbances seen in that disease (which are high-yield and tested often) are

  • decreased Potassium (Hypokalemia)
  • decreased Chloride (Hypo/Achloridya)

Vomiting and Bulimia both lead to hypochloremic hypokalemia and metabolic alkalosis.

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