A urine sodium test is ordered to evaluate the concentration of sodium in the urine. It helps to assess kidney function and to determine whether the kidneys are removing enough sodium from the body.
When this test is required
This test is usually ordered in people with high blood pressure, edema (swelling), heart failure, or kidney disease. It may also be ordered if someone is taking diuretic medication to monitor the effectiveness of the medication.
What the Test Detects
The urine sodium test measures the concentration of sodium in the urine.
Preparation for the Test
There is no special preparation required for this test. However, some medications may interfere with the test results. So, it is important to inform the doctor about all the medications the person is taking.
Sample Requirements
A spot urine sample is required for this test. The person needs to provide a mid-stream clean-catch urine sample.
Additional Notes
A 24-hour urine sodium test may be ordered to provide more detailed information about the sodium excretion by the kidneys. It is important to inform the doctor about all the medications the person is taking, as some medications may interfere with the test results.
