Interpreting thyroid function test results involves understanding several key markers. These tests typically measure levels of thyroid-stimulating hormone (TSH), thyroxine (T4), and triiodothyronine (T3) in the blood. Here’s a basic guide to interpreting results:
- TSH (Thyroid-Stimulating Hormone):
- Normal range: 0.4 to 4.0 milli-international units per liter (mIU/L).
- High TSH levels indicate hypothyroidism, where the thyroid gland is underactive.
- Low TSH levels suggest hyperthyroidism, where the thyroid gland is overactive.
- T4 (Thyroxine):
- Normal range: 4.5 to 11.2 micrograms per deciliter (mcg/dL).
- High T4 levels can indicate hyperthyroidism.
- Low T4 levels might indicate hypothyroidism.
- T3 (Triiodothyronine):
- Normal range: 80 to 200 nanograms per deciliter (ng/dL).
- T3 levels can help confirm a diagnosis of hyperthyroidism if elevated.
- Low T3 levels may indicate hypothyroidism.
Interpretation can vary depending on the specific values and the individual’s symptoms. In some cases, additional tests or medical history may be necessary for a complete diagnosis.
It’s crucial to consult with a healthcare provider for proper interpretation and guidance tailored to your specific situation. Thyroid disorders require careful management and monitoring to optimize health and well-being.