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Search Health Information    Urine Collection

Urine Collection

Your doctor may ask you to collect your urine for 24 hours so that he or she can determine the type of kidney stone you have. The test can also measure urine volume, pH , and other substances that may contribute to urinary problems.

  • The collection period usually starts in the morning. When you first get up, urinate but do not save this urine. Write down the time that you urinated to mark the beginning of your 24-hour collection period.
  • For the next 24 hours, collect all your urine. Your doctor will usually provide you with a large container that holds about 1 gal (4 L) and has a small amount of preservative in it. Urinate into a smaller, clean container and then pour the urine into the large container. Avoid touching the inside of the container with your fingers.
  • Keep the large container in the refrigerator during the collection period.
  • Urinate for the final time at or just before the end of the 24-hour period. Add this urine to the large container, and write down the time.
  • Avoid getting toilet paper, pubic hair, stool (feces), menstrual blood, or other foreign matter in the urine sample.
By Healthwise Staff
Primary Medical Reviewer Anne C. Poinier, MD - Internal Medicine
Specialist Medical Reviewer Tushar J. Vachharajani, MD, FASN, FACP - Nephrology
Last Revised April 28, 2011

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.

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