Definition of Urine specific gravity:

Urine specific gravity is a laboratory test that measures the concentration of all chemical particles in the urine.

See also:

• Urine concentration test
• Urine osmolality
• Urinalysis

How the test is 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 the test will feel:

The test involves only normal urination, and there is no discomfort.

Why the test is performed:

This test helps evaluate your body's water balance and urine concentration.