Kaplan Qbank SIADH question help

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StepOne

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Hey forum,

Ran across a question in Kaplan Qbank that asks which of the following choices (options attached) is consistent with the diagnosis of SIADH. I picked D for euvolemia and ↑urine Na+. But the answer is A (attached) where there is ↑intravascular volume and ↑urine Na+. The explanation they gave is that the patient is both euvolemic and have a ↑intravascular volume. This seems to contradict each other unless they are talking about an acute and chronic case.
Can someone explain this please.

Thanks a bunch
 

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Perhaps what they mean by "clinical euvolemia" is the absence of edema in SIADH, despite the high IV volume.
 
Perhaps what they mean by "clinical euvolemia" is the absence of edema in SIADH, despite the high IV volume.
So when they say euvolemia they don't actually mean that the total bodily fluids are normal but in terms of the lack of symptoms and signs of fluid overload (e.g. edema).
I can also only see an ↑ of IV volume in an acute stage then a steady state is reached in chronic SIADH.
 
So when they say euvolemia they don't actually mean that the total bodily fluids are normal but in terms of the lack of symptoms and signs of fluid overload (e.g. edema).
I can also only see an ↑ of IV volume in an acute stage then a steady state is reached in chronic SIADH.
To my understanding that's what it means.
 
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