Sodium (24 hour urine test)

We remind you that independent interpretation of the results is unacceptable, the information provided below is for reference purposes only.

Sodium (Na) in overnight urine is a laboratory test used to assess the amount of sodium excreted in the urine during the night. Sodium is an essential electrolyte involved in the regulation of fluid and electrolyte balance, fluid volume, and blood pressure.

Urinary sodium measurement may provide information about how the kidneys regulate and excrete sodium and may contribute to the assessment of fluid and electrolyte balance in certain clinical situations.

Indications

• assessment of fluid and electrolyte balance;
• assessment of renal sodium excretion;
• investigation of disorders of sodium metabolism;
• assessment of kidney function in certain clinical situations;
• monitoring of patients with blood pressure or fluid and electrolyte balance disorders, as recommended by a physician;
• assessment of the response to certain treatments, as recommended by a physician;
• other clinical situations, as recommended by a physician.

Procedure

The test is performed using a urine sample collected overnight, according to the laboratory’s instructions. The amount of sodium excreted in the urine during the collection period is determined in the laboratory.

Sources:

https://www.webmd.com/a-to-z-guides/what-is-a-urine-sodium-test
https://www.urmc.rochester.edu/encyclopedia/content.aspx?ContentTypeID=167&ContentID=sodium_urine
https://en.wikipedia.org/wiki/Urine_sodium
https://www.rcpa.edu.au/Manuals/RCPA-Manual/Pathology-Tests/S/Sodium-urine

IMPORTANT!

It is crucial to remember that the information provided in this section is not intended for self-diagnosis or self-treatment. If you experience any symptoms or have a medical condition, it is essential to consult a healthcare professional for proper diagnostic tests and appropriate treatment. Only a qualified healthcare provider can accurately diagnose and prescribe the appropriate treatment. To ensure the most accurate and consistent evaluation of test results, it is recommended to have the tests performed at the same laboratory, as different laboratories may use different methods and units of measurement for similar tests.