DefinitionThe uric acid urine test measures the level of uric acid in the urine. The uric acid blood level can be checked using a blood test. How the Test is PerformedA 24-hour urine sample is often needed. You will need to collect your urine over 24 hours. Your health care provider will tell you how to do this. Follow instructions exactly. How to Prepare for the TestYour provider may ask you to temporarily stop taking medicines that may affect the test results. Be sure to tell your provider about all the medicines you take. These include:
Do not stop taking any medicine before talking to your provider. Be aware that alcoholic drinks, vitamin C, and x-ray dye can also affect test results. How the Test will FeelThe test involves only normal urination. There is no discomfort. Why the Test is PerformedThis test may be done to help determine the cause of a high uric acid level in the blood. It may also be done to monitor people with gout, and to choose the best medicine to lower the uric acid level in the blood. Uric acid is a chemical created when the body breaks down substances called purines. Most uric acid dissolves in blood and travels to the kidneys, where it passes out in urine. If your body produces too much uric acid or does not remove enough of it, you may get sick. A high level of uric acid in the body is called hyperuricemia and it can lead to gout or kidney damage. This test may also be done to check whether a high uric acid level in the urine is causing kidney stones. Normal ResultsNormal values range from 250 to 750 mg/24 hours (1.48 to 4.43 mmol/24 hours). 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 MeanA high uric acid level in the urine may be due to:
A low uric acid level in the urine may be due to:
RisksThere are no risks with this test. ReferencesDalbeth N. Clinical features and treatment of gout. In: Firestein GS, Budd RC, Gabriel SE, Koretzky GA, McInnes IB, O'Dell JR, eds. Firestein and Kelley's Textbook of Rheumatology. 11th ed. Philadelphia, PA: Elsevier; 2021:chap 101. Riley RS, McPherson RA. Basic examination of urine. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Philadelphia, PA: Elsevier; 2022:chap 29. | |
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Review Date: 8/20/2023 Reviewed By: Jacob Berman, MD, MPH, Clinical Assistant Professor of Medicine, Division of General Internal Medicine, University of Washington School of Medicine, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. No warranty of any kind, either expressed or implied, is made as to the accuracy, reliability, timeliness, or correctness of any translations made by a third-party service of the information provided herein into any other language. © 1997- A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited. | |
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Uric acid test
Uric acid crystals
