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Monday, October, 19, 2009

How Does Calcium Help The Body

Health Encyclopedia: Calcium Ionized

Definition

Ionized calcium is a test that measures the amount of free calcium (Ca++, Ca +2) in the blood. (See also serum calcium.) Ionized or free calcium is the metabolically-active portion of calcium and is not bound to proteins in the blood.


Alternative Names

Free calcium; Ionized calcium


How the test is performed

Blood is drawn from a vein (venipuncture) or capillary. The laboratory centrifuges the blood to separate the cells from the serum. The ...

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