Thyroid Function Test
Understanding Thyroid Function Test
What is Thyroid Function Test?
Thyroid function tests are blood tests that help to check the function of your thyroid gland. They are mainly used to detect an underactive thyroid gland (hypothyroidism) and an overactive thyroid gland (hyperthyroidism).
This test is prescribed by the doctor to diagnose any suspected thyroid disease (Hypothyroidism or Hyperthyroidism) and to monitor the patient’s response to thyroid diseases treatment.
What is Thyroid Function Test used for?
- To help evaluate thyroid gland function
- To help diagnose thyroid disorders
- To monitor the response to treatment
- As a routine health checkup or when symptoms suggest hypo- or hyperthyroidism due to a condition affecting the thyroid
What does Thyroid Function Test measure?
Contains 3 tests
Triiodothyronine Total
A Triiodothyronine Total measures triiodothyronine, also known as T3, hormone that is produced by the thyroid gland. T3 hormone plays an important role in regulating the body's metabolism, energy levels, and growth & development. It exists in the blood in two forms: free T3 and bound T3. Free T3 is not bound to proteins in the blood and is the active form of T3. Whereas, bound T3 is bound to proteins, such as albumin and thyroid hormone binding globulin (THBG), which prevent it from entering the body tissues.
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Thyroxine - Total
A Thyroxine - Total measures both the bound and unbound/free form of thyroxine (T4) hormone in the blood. T4 exists in the blood in two forms: bound (attached to proteins) and free (not attached to proteins). Most of the T4 circulating in the blood is bound to proteins and only a small part is free. It is necessary to maintain a fine balance of these forms to ensure the proper functioning of the body.
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Other tests
