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Also known as: Na
Formal name: Sodium

At a Glance

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 acute hypernatremia 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 24-hour urine sample

Test Preparation Needed?