Also known as: Urine appearance and color and Routine urine test
- Is it clear or cloudy?
- Is it is pale, or dark yellow, or another color?
- Check if there are any cells, urine crystals, urinary casts, mucus, and other substances.
- Identify any bacteria or other germs.
- A special strip (dipstick) is used to test for substances in the urine sample. The strip has pads of chemicals that change color when they come in contact with substances of interest.
- Iron supplements
- Red blood cells
- White blood cells
Urinalysis is the physical, chemical, and microscopic examination of urine. It involves a number of tests to detect and measure various compounds that pass through the urine.
How the Test is Performed
A urine sample is needed. Your health care provider will tell you what type of urine sample is needed. Two common methods of collecting urine are 24-hour urine collection and clean catch urine specimen.
The sample is sent to a lab, where it is examined for the following:
PHYSICAL COLOR AND APPEARANCE
How the urine sample looks to the naked eye:
The urine sample is examined under a microscope to:
CHEMICAL APPEARANCE (urine chemistry)
Examples of specific urinalysis tests that may done to check for problems include:
How to Prepare for the Test
Certain medicines change the color of urine, but this is not a sign of disease. Your provider may tell you to stop taking any medicines that can affect test results.
Medicines that can change your urine color include:
How the Test will Feel
The test involves only normal urination, and there is no discomfort.
Why the Test is Performed
A urinalysis may be done:
Normal urine varies in color from almost colorless to dark yellow. Some foods, such as beets and blackberries, may turn urine red.
Usually, glucose, ketones, protein, and bilirubin are not detectable in urine. The following are not normally found in urine:
Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your provider about the meaning of your specific test results.
What Abnormal Results Mean
Abnormal results may mean you have an illness, such as:
Your provider can discuss the results with you.
There are no risks.
If a home test is used, the person reading the results must be able to see the difference between colors, because the results are interpreted using a color chart.
McPherson RA, Ben-Ezra J. Basic examination of urine. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 22nd ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 28.
- Review date:
- December 07, 2016
- Reviewed by:
- Linda J. Vorvick, MD, Medical Director and Director of Didactic Curriculum, MEDEX Northwest Division of Physician Assistant Studies, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.
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