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Thyroid Function

Thyroid Panel
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The thyroid gland is responsible for regulating how your body uses energy. The thyroid also produces hormones critical to proper cell and system functioning. The Thyroid Panel screens for thyroid disease, hyperthyroidism and hypothyroidism by examining your body’s production of the thyroid hormones TSH, T3 and T4. This panel also includes your Thyroxine Index – basically a math computation estimate based on your T4 and T3 tests. There are two types of thyroid disorders including: • Hypothyroidism (underactive thyroid) – symptoms may include fatigue, weight gain, a short attention span, and numbness or cold intolerance. • Hyperthyroidism (overactive thyroid) – symptoms may include weight loss, persistent vomiting, increased blood pressure, hair loss or a persistently fast heart rate.

  1. Thyroid Panel

    Thyroid Panel

    The thyroid gland is responsible for regulating how your body uses energy. The thyroid also produces hormones critical to proper cell and system functioning. The Thyroid Panel screens for thyroid disease, hyperthyroidism and hypothyroidism by examining your body’s production of the thyroid hormones TSH, T3 and T4. This panel also includes your Thyroxine Index – basically a math computation estimate based on your T4 and T3 tests. There are two types of thyroid disorders including: • Hypothyroidism (underactive thyroid) – symptoms may include fatigue, weight gain, a short attention span, and numbness or cold intolerance. • Hyperthyroidism (overactive thyroid) – symptoms may include weight loss, persistent vomiting, increased blood pressure, hair loss or a persistently fast heart rate.
    $79.00
  2. T-3, FREE

    T-3, FREE

    T-3, FREE - Free T3 measures the free, unbound levels of triiodothyronine in your bloodstream. Free T3 is considered more accurate than Total T3. Free T3 is typically elevated in hyperthyroidism, and lowered in hypothyroidism.
    $49.00
  3. T4, TOTAL

    T4, TOTAL

    This test measures the total amount of circulating thyroxine in your blood. Thyroxine, a hormone produced by the thyroid, is also known as T4. A high value can indicate hyperthyroidism, a low value can indicate hypothyroidism. Total T4 levels can be elevated due to pregnancy, and other high estrogen states, including use of estrogen replacement or birth control pills.
    $49.00
  4. TSH

    TSH

    The Thyroid Stimulating Hormone (TSH) test checks your body’s production of TSH and helps screen for thyroid disease, hyperthyroidism and hypothyroidism.
    $49.00
  5. T-4, FREE

    T-4, FREE

    Free T4 measures the free, unbound thyroxine levels in your bloodstream. Free T4 is typically elevated in hyperthyroidism, and lowered in hypothyroidism. Free or unbound T4 levels represent the level of hormone available for uptake and use by cells. Because the free levels of T4 represent immediately available hormone, free T4 is thought to better reflect the patient’s hormonal status than total T4.
    $49.00
  6. T-3 UPTAKE

    T-3 UPTAKE

    T3-Uptake, reflects the level of thyroid-binding globulin (TBG) that is bound by T4. For example, when TBG concentration is decreased, less TBG is available to bind labeled triiodothyronine (T3), and more labeled T3 reagent binds to the solid-phase material (increased T3 uptake). This is also the case in hyperthyroidism, where higher levels of T4 are present and bind with the TBG, effectively reducing the TBG available to bind with labeled T3. T3-Uptake and TT4 results are used to calculate the FTI, as an estimate of biologically active thyroxine (FT4) status.
    $49.00
  7. T-3, TOTAL

    T-3, TOTAL

    A T3 test is used to assess thyroid function. It is ordered primarily to help diagnose hyperthyroidism and may be ordered to help monitor the status of a person with a known thyroid disorder. The T3 test is usually ordered following an abnormal TSH and T4 test. Either the total T3 or the free T3 may be ordered. Since most of the T3 is bound to protein, the total T3 can be affected by protein levels and protein binding ability, but the free T3 is not. T3 testing may be ordered along with thyroid antibodies to help diagnose Graves disease, an autoimmune disorder that is the most common cause of hyperthyroidism.
    $49.00

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