Thyroid-stimulating hormone test charts show the reference range for TSH blood test results, and are used to determining whether a person has thyroid problems, according to WebMD. Other heath factors are also considered, so an abnormal result in one testing lab may be within normal range in another lab.
The pituitary gland releases TSH in response to the hypothalamus releasing thyrotropin-releasing hormone. Two hormones, triiodothyronine and thyroxin, are released by the thyroid for control of metabolism, states WebMD.
Testing for TSH levels in blood is performed to aid in determining thyroid function, cause of hypothyroidism, tracking of thyroid medications, tracking of hyperthyroid treatment, and giving a second opinion of congenital hypothyroidism in a newborn baby, explains WebMD. Testing poses risks in very few people, but some do have complications from the blood test, such as bruising at the site where the needle is inserted, phlebitis and nonstop bleeding.
Applying pressure at the site of the needle insertion helps to avoid bruising, states WebMD. Relief from phlebitis, or swollen veins, is achieved by applying warm compresses. Blood-thinners, such as aspirin and warfarin, can interfere with the test results or cause continuous bleeding. Patients must notify the doctor prior to taking the TSH blood test if taking blood thinners.