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DefinitionThis test measures the amount of chloride in serum (serum is the fluid portion of the blood).
How the test is performedBlood is drawn from a vein or capillary. The laboratory centrifuges the blood to separate the cells from the serum. The chloride test is done on serum.
How to prepare for the test
Your doctor may instruct you to withhold drugs that can affect the test, such as:
Never stop taking medication unless instructed by your doctor.
Why the test is performedChloride (Cl-) is the major negative ion in the fluid outside the body's cells. Its main function is to maintain electrical neutrality, mostly as a counter-ion to sodium . Changes in the chloride level often accompany sodium losses and excesses.
Normal values may vary slightly from laboratory to laboratory. A typical normal range is 96 to 106 mEq/L.
What abnormal results meanGreater-than-normal levels may indicate:
Update Date: 9/15/2003Irfan A. Agha, M.D., Department of Medicine, Renal Division, St. Louis University, St. Louis, MO. Review provided by VeriMed Healthcare Network.
Last updated: Tue, 06 Jan 2009 00:20:03 GMT