Parathyroid Hormone Test
2,800 Kshs | Home Collection Available
Synonyms
Parathormone, Parathyroid hormone. (PTH)
Purpose of The Parathyroid Hormone Test
The parathyroid hormone (PTH) test measures PTH levels in the blood to evaluate the function of the parathyroid glands, which regulate calcium and phosphorus. This test helps diagnose and monitor conditions such as Overactive parathyroid glands (Hypoparathyroidism), Low parathyroid hormone (Hypoparathyroidism), chronic kidney disease, and certain bone diseases. It is often ordered when calcium levels in the blood are abnormal to identify underlying causes and assess bone health.
Patient Preparation
It’s recommended to fast for at least 8-10 hours before the test. Inform your healthcare provider about any medications or supplements you are taking, avoid stress, and drink plenty of water
Samples for PTH Testing
Reference Range
10-65 ng/mL.
Results Turnaround
Within 1-3 days of receiving the samples.
Diseases / Diagnostic Indicators of Parathyroid hormone (PTH)
The Parathyroid Hormone (PTH) Test helps evaluate parathyroid gland function and calcium balance in the body. It is often used to diagnose the cause of abnormal blood calcium levels.
High PTH levels may indicate:
- Primary hyperparathyroidism – often caused by a benign tumor in the parathyroid gland
- Secondary hyperparathyroidism – due to low calcium levels from vitamin D deficiency or chronic kidney disease
- Tertiary hyperparathyroidism – seen in long-term kidney disease, where PTH remains high despite corrected calcium levels
Low PTH levels may suggest:
- Hypoparathyroidism – underactive parathyroid glands, possibly from autoimmune disease or after thyroid/parathyroid surgery
- High calcium levels (hypercalcemia) – from cancer, excessive calcium or vitamin D intake, which suppresses PTH production
- Clinicians interpret PTH levels alongside blood calcium, phosphate, and vitamin D levels to diagnose and manage calcium-related disorders effectively.
For more on Parathyroid Hormone Testing, read this study.