What is Ionized Calcium?
Ionized calcium is the free calcium running through the body in blood. Calcium is used by all cells to complete the work they do in the body. In order for cells to access the calcium they need, the free calcium must move to the cells, thus levels in the blood.
Doctors typically order a total calcium value during a blood test, but if immunoglobulin or albumin values are not normal, an ionized calcium test can be ordered to help rule of parathyroid or kidney disease
Normal Lab Values
- Negative Pregnancy Adult: 4.5 to 5.3 mg/dL to 1.13 to 1.33µmol/L
- Pregnancy Trimester One: 4.5 to 5.1 mg/dL to 1.13 to 1.28 µmol/L
- Pregnancy Trimester Two: 4.4 to 5 mg/dL to 1.1 to 1.25 µmol/L
- Pregnancy Trimester Three: 4.4 to 5.3 mg/dL to 1.1 to 1.33 µmol/L
Increased serum calcium levels can be a sign of hyperparathyroidism, malignancy, vitamin D intoxication, sarcoidosis or hyperthyroidism.