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PTH
Why the test is performed:
This test may be performed when PTH abnormality is suspected as a cause of abnormal calcium or phosphorus levels. PTH is a protein hormone secreted by the parathyroid gland which is the most important regulator of body calcium and phosphorus. Text Continues Below
PTH: - Increases the calcium and phosphorus release from bone
- Decreases the loss of calcium and increases the loss of phosphorus in the urine
- Increases the activation of 25-hydroxy vitamin D to 1,25-dihydroxy vitamin D in the kidneys
Secretion of PTH is regulated by the level of calcium in the blood. Low serum calcium causes increased PTH to be secreted, whereas increased serum calcium inhibits PTH release.
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