THYROID Stimulating Hormone-TSH

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tsh
$28.51

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The thyroid stimulating hormone (TSH) is produced and secreted by the pituitary gland and stimulates the thyroid to produce T3 and T4. When TSH is elevated, low thyroid function may be indicated. If TSH is low it is indicative of high thyroid function.

The thyroid stimulating hormone (TSH) is produced and secreted by the pituitary gland and stimulates the thyroid to produce T3 and T4. When TSH is elevated, low thyroid function may be indicated. If TSH is low it is indicative of high thyroid function.

The TSH test is used as a first-line screening tool to assess thyroid disease. Additionally, health care providers check TSH to monitor disease progression and treatment. TSH is included in the Complete Thyroid Panel. A more detailed thyroid panel with antibodies that can detect Hashimoto's disease can also be purchased.

The first signs of thyroid disorder are typically related to symptoms like fatigue, weight gain, cold intolerance, hair loss, sexual dysfunction, etc. and blood screening using the Thyroid Stimulating Hormone (TSH) test with other thyroid hormone biomarkers including free thyroxine (T4, free). Unfortunately, some physicians only measure TSH as a way to diagnose low or high thyroid function. Even though some guidelines suggest a TSG range of 0.4-4.5 micro IU/mL, some patients may be experiencing hypothyroidism symptoms at TSH levels above 3 due to occult Hashimoto’s disease or other issues, so it is always a good idea to perform a thyroid panel that includes not only TSH but also free T3 and free T4. There is ongoing controversy about whether reliance on the TSH test -- to the exclusion of clinical symptoms and other tests such as Free T4, Free T3, and antibodies tests -- is medically sound. That is a controversy that is unlikely to be decided for years. The situation today, however, is that the majority of physicians do rely almost exclusively on the TSH test to detect thyroid disease, and monitor the effectiveness of treatment.

What is the Thyroid Stimulating Hormone (TSH) Test?

· The TSH test is used as a first line screening tool to assess thyroid disease. Additionally, health care providers check TSH to monitor disease progression and treatment

· TSH is high in primary hypothyroidism

· Low TSH occurs in hyperthyroidism

· Evaluation of therapy in hypothyroid patients receiving various thyroid hormone preparations although free T3 should also be evaluated along with patient’s symptoms

· Range: 0.450−4.500 μIU/mL (>10 yr old). This range is in debate.

· Methodology: Electrochemiluminescence immunoassay (ECLIA)

 

Potential Interactions with the TSH test

 

Many multivitamins, supplements (especially hair and nail), and over-the-counter and prescription medications may affect thyroid test results and their use should be discussed with your healthcare practitioner prior to testing. For example, biotin (vitamin B7) can interfere with some lab tests, so your healthcare practitioner may advise you to refrain from taking biotin or supplements that contain biotin for a few days before having blood drawn for a TSH test. If you have a procedure done in which fluorescein dyes are injected into your blood (e.g., angiography), you may need to wait a few days before having a TSH test done.


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