Compared to D5W with insulin, Kayexelate lowers potassium how?

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Prepare for the Mark Klimek Electrolytes and Endocrine Test. Utilize flashcards, multiple choice questions, and detailed explanations for each query to enhance your understanding. Ace your exam!

Multiple Choice

Compared to D5W with insulin, Kayexelate lowers potassium how?

Explanation:
Potassium lowering can happen by two different mechanisms, and the time course matters. Insulin with glucose (like D5W with insulin) drives potassium into cells quickly via stimulating the Na+/K+-ATPase, so the serum potassium drops within minutes to a few hours. Kayexelate, on the other hand, is a gut resin that exchanges potassium for sodium in the colon and then eliminates it in the stool. That process reduces total body potassium, but it depends on GI transit and stool output, so its effects unfold over hours to days and are not as rapid as the insulin-driven shift. Therefore, Kayexelate lowers potassium more slowly than D5W with insulin.

Potassium lowering can happen by two different mechanisms, and the time course matters. Insulin with glucose (like D5W with insulin) drives potassium into cells quickly via stimulating the Na+/K+-ATPase, so the serum potassium drops within minutes to a few hours. Kayexelate, on the other hand, is a gut resin that exchanges potassium for sodium in the colon and then eliminates it in the stool. That process reduces total body potassium, but it depends on GI transit and stool output, so its effects unfold over hours to days and are not as rapid as the insulin-driven shift. Therefore, Kayexelate lowers potassium more slowly than D5W with insulin.

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