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A member asked:
In a pt w/ serum k+ 1.9meq/dl and bg 747mg/dl, why is it important to withhold insulin until k+ is in normal range, eventhough this can be several day?
A doctor has provided 1 answer
K deficiency: This person has a profound potassium deficiency. High glucose pulls k out of cells -- leading to elevated serum k. So, in this context, a serum k of 1.7 reflects this pull of k out of cells. So this person has a PROFOUND K DEFICIENCY. Insulin drives k into cells, so the serum k will decline below 1.7. And ,high glucosse causes glucosuria, which has a profound diuretic effect - ongoing k loss
Answered 10/31/2014
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