2. Is it really necessary to collect urine for 24 hours?
Yes, for accurate test results it is essential that all of the urine be collected. Because catecholamines are released in varying amounts at varying times, the one sample not included might be the one with the most hormones in it. For general instructions, read about the 24-hour urine collection.
This article was last reviewed on October 8, 2015. | This article was last modified on October 8, 2015.
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