At a Glance
Why Get Tested?
To determine whether PTH concentrations are responding normally to changes in blood calcium concentration; to distinguish the cause of calcium imbalances, and to evaluate parathyroid function. In some laboratories, PTH may be measured during surgery for hyperparathyroidectomy. This is to help confirm removal of the parathyroid gland(s).
When to Get Tested?
When calcium blood levels are higher or lower than normal, and when your doctor wants to determine how well your parathyroid gland is functioning.
A blood sample taken from a vein in your arm.
Test Preparation Needed?