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What is a CALCIUM TOTAL & IONIZED?

Calcium Total & Ionized is a blood test that measures both the total calcium in the bloodstream and ionized calcium, the biologically active form. Calcium is essential for healthy bones, muscle contraction, nerve transmission, and normal heart function. The test is needed to evaluate abnormal calcium levels and investigate conditions affecting the parathyroid glands, kidneys, bones, or vitamin D metabolism, especially when routine calcium results require further clarification.

Additional Information

Also known as/ Other names: Serum Calcium (Total & Ionized), Total Calcium and Ionized Calcium Test, Blood Calcium (Total and Free), Calcium (Bound and Unbound) Assay, Plasma Calcium – Total & Ionized, Comprehensive Calcium Test
Parameters: 2
Recommended for: M/F/Others
Sample Type: Blood
Patient Preparation: No prior preparation is needed
Reports: Same Day

FAQs

Why are both total and ionized calcium measured?

Measuring both provides a more complete assessment of calcium status. Ionized calcium can offer additional information when total calcium may be affected by changes in blood proteins.

What is ionized calcium?

Ionized calcium is the free, unbound form of calcium. It is the form directly involved in muscle contraction, nerve transmission, blood clotting, and other physiological processes.

What is total calcium?

Total calcium includes calcium bound to proteins, mainly albumin, as well as calcium that is freely circulating in the blood.

What does a high calcium level mean?

High calcium, or hypercalcemia, can occur with parathyroid disorders, certain cancers, excessive vitamin D or calcium intake, and other medical conditions.

What does a low calcium level mean?

Low calcium, or hypocalcemia, may occur with vitamin D deficiency, kidney disease, parathyroid disorders, low magnesium, or other conditions affecting calcium regulation.

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