What Is A PTH Test?
Parathyroid Hormone is produced by the parathyroid glands present in the neck near the thyroid gland. PTH helps regulate calcium, phosphorus and vitamin D levels in the blood which are essential for healthy bones, muscles and nerves. The test is essential for diagnosing conditions related to calcium imbalances such as hyperparathyroidism, hypoparathyroidism, and osteoporosis.
Doctors often recommend this test for patients exhibiting symptoms of calcium imbalance, kidney disease or bone disorders. This test is a useful way of assessing if the parathyroid gland is functioning properly and if there are any underlying conditions affecting calcium metabolism. It is often ordered alongside calcium and vitamin D tests to provide a comprehensive assessment of bone health and metabolic function. Early detection through PTH testing can help prevent complications like kidney stones, weak bones, and neuromuscular disorders.
How is the Test Performed?
Sample Collection
PTH test requires a blood sample which is usually drawn from the vein of the patient.
Lab Analysis
The sample undergoes analysis using immunoassay techniques to determine the concentration of parathyroid hormone. The results help doctors assess whether PTH levels are within the normal range or indicate an underlying health condition.
Result
Results are usually available within a day or two.
What are the symptoms that prompt this test?
Common symptoms exhibited by patients are:
- Muscle weakness
- Bone pain or fractures
- Fatigue
- Frequent urination
- Kidney stones
- Depression or mood swings
- Nausea and loss of appetite
- Slow growth or delayed development in children
- Bone deformities in children
- Muscle cramps
- Dental problems in children like delayed crowning etc.
What are Normal Ranges for This Test?
The normal ranges for this hormone can vary based on age, sex and time of the day the test is performed. The general accepted normal ranges are:
Infants – Less than 630 ng/dL (nanograms per deciliter) after birth with levels decreasing after first few days.
Children (pre puberty) – Less than 110 ng/dL for male and less than 100 ng/dL for females.
Adult Women – Less than 285 ng/dL for pre-menopausal women and less than 51 ng/dL for postmenopausal women.
Adult Men – Less than 220 ng/dL for males.
**The ranges may vary depending on the assay of test, time of day when sample was collected.**
What Are Normal Ranges for This Test?
Normal range is 10-65 pg/mL in both men and women. However the levels may fluctuate in women during pregnancy or menopause.
** Normal levels are dependent on a number of factors including age, gender, testing method and health condition of patient etc. Result interpretation should be done by a qualified doctor or healthcare professional.**
