Test guide
Sodium Blood Test
A sodium blood test measures the amount of sodium in your blood. Sodium is a type of electrolyte . Electrolytes are minerals that have an electrical charge when they are dissolved in water or body fluids. You have electrolytes in your blood, urine (pee), tissues, and other body fluids. They help control the amount of fluid and the balance of acids and bases (pH balance) in your body. Sodium also helps your nerves and muscles work properly.
What it is for
A sodium blood test is a routine test that may be used to check your general health. It may be used to help find and monitor conditions that affect the balance of fluids, electrolytes, and acidity in your body. The test is often done as part of a group of tests called an electrolyte panel . It may also be part of two other groups of tests called a basic metabolic panel (BMP) and a comprehensive metabolic panel (CMP). Source: MedlinePlus, National Library of Medicine. Medical test information is public domain. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.
Limitations
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.
Also known as
- Na test
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