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Urine Osmolality Test
Overview & Description
A urine osmolality test measures the osmolality, or concentration of particles, in a person's urine. It provides information about the body's ability to balance fluids and other substances.
Who is a candidate for the test?
A urine osmolality test is done when fluid balance or kidney problems are suspected.
How is the test performed?
A mid-stream, or clean-catch, urine sample is required for this test. First, the entire area around the urethra should be washed off to prevent contamination of the sample. Then, a person should:
The container should be covered and brought to the healthcare provider or lab for testing.