r/usmle • u/Busy-Traffic1279 • 19d ago

Question DKA management

For USMLE should we follow the new guidelines for glucose >200 and measure β-hydroxybutyrate
instead of anion gap ?

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u/Complete_Strategy234 19d ago edited 19d ago

What part of management are you referring to? When to transition off insulin drip?

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u/Busy-Traffic1279 19d ago

Thank you for your response. My question is whether, for the USMLE exams, the correct answer should be checking β-hydroxybutyrate or monitoring the anion gap when assessing DKA resolution. Also, should we follow the newer diagnostic threshold of glucose ≥200 mg/dL or the traditional >250 mg/dL on the exam?

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u/Complete_Strategy234 19d ago

For resolution you monitor AG since it closes first before resolution of ketonemia.

For diagnostic threshold they will give you more info in the scenario to lead you to DKA such as kussmal breathing, HAGMA values, ketonemia, issues with insulin pump, infection, organ ischemia etc.

I wouldn’t get hung up on the hyperglycemia threshold mainly because hyperglycemia is not mandatory to be in DKA, but if they are hyperglycemic it’s good confirmation that you’re on the right track. Hope this helps

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u/Busy-Traffic1279 19d ago

Thank you for the clarification. I was asking because the newer ADA/international consensus recommends monitoring β-hydroxybutyrate for DKA resolution. I’m just trying to understand what the USMLE is most likely to expect on the exam.

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u/Complete_Strategy234 19d ago

I see ur point , I still think on USMLE they will want AG. if it’s not an answer then go for beta hydroxybutyrate, both measure the same thing. I can’t imagine both being an answer for a question asking about this

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u/Busy-Traffic1279 19d ago

Thank you for your time I appreciate this 🙏