
Free Thyroxine (T4) Analysis
Free Thyroxine (T4) Analysis is a blood test that measures the level of free T4, the unbound and biologically active form of the thyroid hormone thyroxine. This test is crucial for assessing thyroid function because it provides a direct measurement of the hormone available for use by the body, independent of the proteins that normally bind T4 and affect its function.
Reference Range:
Normal Range: Between 0.9 to 2.3 nanograms per deciliter (ng/dL).

Free T4 Analysis is crucial for accurately assessing the levels of active thyroid hormone in the blood, aiding in the diagnosis and management of thyroid disorders. For hypothyroidism, thyroid hormone replacement therapy is administered to normalize free T4 levels, while regular monitoring of free T4 and Thyroid Stimulating Hormone (TSH) ensures that dosages are effectively tailored to patient needs. In cases of hyperthyroidism, treatment options include antithyroid medications, radioactive iodine, or surgery based on the condition's severity and cause. Meticulous management and continuous evaluation of free T4 are essential for maintaining optimal thyroid health.