Urine specific gravity
Alternate Names : Urine density
Urine specific gravity is a laboratory test that measures the concentration of all chemical particles in the urine.
Why is the Test Performed?
This test helps evaluate your body's water balance and urine concentration.
How is the Test Performed?
The test requires a clean-catch urine sample. For information on how to collect this urine sample, see: Clean-catch urine culture
How to Prepare for the Test?
Your health care provider will instruct you, if necessary, to discontinue drugs that may interfere with the test. Drugs that can increase specific gravity measurements include dextran and sucrose. Receiving intravenous dye (contrast medium) for an x-ray exam up to 3 days before the test can also interfere with results.
Eat a normal, balanced diet for several days before the test.
How will the Test Feel?
The test involves only normal urination, and there is no discomfort.
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