A nurse teaches a client who has been prescribed a 24-hour urine collection to measure excreted hormones. The client asks, "Why do I need to collect urine for 24 hours instead of providing a random specimen?" How should the nurse respond?
a. "This test will assess for a hormone secreted on a circadian rhythm."
b. "The hormone is diluted in urine; therefore, we need a large volume."
c. "We are assessing when the hormone is secreted in large amounts."
d. "To collect the correct hormone, you need to urinate multiple times."
ANS: A
Some hormones are secreted in a pulsatile, or circadian, cycle. When testing for these substances, a collection that occurs over 24 hours will most accurately reflect hormone secretion. Dilution of hormones in urine, secretion of hormone amounts, and ability to collect the correct hormone are not reasons to complete a 24-hour urine test.
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