Calcium, Ionized
Alternate Names : Ionized Calcium, Free Calcium
What do the test results mean?
The normal range for levels of free calcium in the blood is from 4.4 to 5.3 milligrams per deciliter (mg/dl) in adults and from 4.4 to 6.0 mg/dl in children.
Abnormally high levels of free calcium may indicate:
hyperparathyroidism, or excess activity of the parathyroid glands
metastatic bone tumor, or cancer cells are spreading to other parts of the body from a tumor in the bone
milk-alkali syndrome, which occurs when continuous ingestion of antacids has caused loss of normal body acidity
multiple myeloma, a cancer of the bone marrow
Paget's disease, a bone disorder causing deformities
sarcoidosis, a disorder causing abnormalities of the bones, lungs, skin, eyes, muscles and lymph nodes
tumors producing molecules that mimic the activity of the parathyroid glands
vitamin D intoxication
Abnormally low levels of free calcium may indicate:
hypoparathyroidism, or abnormally low activity of the parathyroid glands
malabsorption of nutrients from the bowel
osteomalacia, or bone softening in adults
pancreatitis, or inflammation of the pancreas
kidney failure
rickets, or bone softening in children
vitamin D deficiency
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