Why get tested? To determine whether your sodium concentration is within normal limits and to help evaluate electrolyte balance and kidney function; to monitor chronic or acutehypernatremia or hyponatremia
When to get tested? If you are experiencing dehydration or edema; also to monitor certain chronic conditions, like high or low blood pressure
Sample required? A blood sample drawn from a vein in the arm or, in some cases, a urine sample
This article was last reviewed on March 20, 2008.
This page was last modified on April 8, 2009.
The review date indicates when the article was last reviewed from beginning to end to ensure that it reflects the most current science. A review may not require any modifications to the article, so the two dates may not always agree.
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