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Electrolytes


Definition:

Electrolytes are minerals in your blood and other body fluids that carry an electric charge.

Electrolytes affect the amount of water in your body, the acidity of your blood (pH), your muscle function, and other important processes. You lose electrolytes when you sweat. You must replace them by drinking fluids.

Common electrolytes include:

  • Calcium
  • Chloride
  • Magnesium
  • Phosphorous
  • Potassium
  • Sodium

Electrolytes can be acids, bases, and salts.

They can be measured by laboratory studies of the blood in different ways. Each electrolyte can be ordered as a separate test, such as:

Note: Serum is the part of blood that doesn't contain cells.

Sodium, potassium, and chloride can also be ordered as part of an electrolyte panel or a basic metabolic panel.

The electrolytes - urine test measures electrolytes in urine. It usually measures the levels of calcium, chloride, potassium, or sodium.


Review Date: 9/20/2011
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. Copyright 2002 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

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