Certified Gastroenterology RN Exam Prep

Category - Reduction of Risk

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A client has a serum calcium level of 5.0 mg/dL. As the nurse reviews the client's records, which information is the most likely cause of the laboratory result?

Over activity of parathyroid glands
Excessive vitamin D levels
Intake of furosemide
Renal failure

Explanation

Answer - C - The normal serum calcium level is between 8.6 and 10.0 mg/dL. A calcium level of 5.0 mg/dL indicates hypocalcemia. Loop diuretics, such as furosemide, may increase the excretion of calcium, which increases the risk for hypocalcemia. The other options increase the risk for hypercalcemia.

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