An electrolyte panel is a group of blood tests that measures electrolyte levels to assess the general functioning of the patient’s organ systems. Electrolytes are minerals that are found naturally in the body and help regulate a number of functions. Electrolytes that are typically measured include potassium, chloride and sodium. Carbon dioxide, a waste product, is often included in the electrolyte panel. This can be measured in the blood in the form of bicarbonate. Other substances that are sometimes measured include calcium, magnesium and phosphorous, although these are not part of the standard electrolyte panel. The results of an electrolyte panel can help the physician make a diagnosis or help monitor the progress of treatment with medications.

Patients need to inform their physician of all prescription medications, over-the-counter medications, herbal remedies and vitamin supplements they may be taking because there is a wide variety of substances (e.g., birth control pills) that can affect the results of these tests. Patients also need to follow their physician’s orders carefully regarding the food, drink or medications that can be taken or should be avoided before the test.