Thyroid Panel (TSH, TPO, Free T4, Free T3)
This panel is used to evaluate thyroid function. The combination of the serum T4 and T3 uptake (THBR) as an indirect assessment of thyroxine-binding globulin (TBG). TBG helps to determine whether an abnormal T4 value is due to alterations in serum thyroxine-binding globulin or to changes of thyroid hormone levels. Deviations of both tests in the same direction usually indicate that an abnormal T4 is due to abnormalities in thyroid hormone. Deviations of the two tests in opposite directions provide evidence that an abnormal T4 may relate to alterations in TBG. This panel consists of the following tests: Thyroid-Stimulating Hormone (TSH), Thyroid Peroxidase Antibody (TPO), Free Thyroxine (T4), Free Tri-iodothyronine (T3):
- Thyroid-Stimulating Hormone (TSH)
This test is used to identify primary hypothyroidism and to differentiate it from secondary (pituitary) and tertiary (hypothalamus) hypothyroidism.
- Thyroid Peroxidase Antibody (TPO)
This test is used to evaluate thyroid function. A thyroid peroxidase test detects antibodies against TPO in the blood. The presence of thyroid peroxidase antibodies in your blood suggests that the cause of thyroid disease is due to an autoimmune disorder such as Hashimoto's disease or Graves' disease. In autoimmune disorders, your immune system makes antibodies that mistakenly attack normal tissue. Antibodies that attack the thyroid gland cause inflammation and impaired function of the thyroid.
- Thyroxine (T4) Free, Direct
This test is used to evaluate thyroid function in individuals who may have protein abnormalities that could affect total T4 levels. It is used to evaluate thyroid function and monitor replacement and suppressive therapy.
- Tri-iodothyronine (T3), Free, Serum
This test is used to evaluate thyroid function. It is primarily used to diagnose hyperthyroidism. It is also used to assess abnormal binding protein disorders and to monitor thyroid replacement and suppressive therapy
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About Blood Spot Testing
Blood Spot is the future of blood testing and is a convenient form of health and wellness testing. The development and application of blood spot testing allows monitoring of hormone levels, cardiometabolic markers and Vitamin D. The convenient collection of blood from a tiny nick of the finger, allows for flexibility of testing at the right time of day, month or following hormone therapy. Blood Spot testing provides results on par with those from serum tests but without the cost and inconvenience of conventional blood draws, making it beneficial for both patient and practitioner.
Complete Thyroid Profile