The nurse is reviewing the plan of care for a client with a disorder of the thyroid gland. Which diagnostic test would the nurse expect the physician to order to evaluate thyroid hormones?
A) Magnetic resonance imaging
B) Radioimmunoassay
C) Computed tomography (CT)
D) Cortisol level determination
B
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A radioimmunoassay determines the concentration of a substance in plasma. A T3 determination by radioimmunoassay evaluates thyroid hormone function. A CT or magnetic resonance imaging scan is done to detect a suspected tumor and to determine organ size and placement. Cortisol levels determine adrenal hyperfunction.
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