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The thyroid gland is an endocrine gland which is present in the neck. It is the largest gland present in the body and consists of two lobes. This gland secretes thyroid hormones such as triiodothyronine (T3), thyroxine (T4) and calcitonin which primarily have a role to influence the metabolic rate and protein synthesis. The secreted hormones are also responsible for some other effects including those on development.
Thyroid Function Test
These tests are actually a series of blood tests which are performed to measure how well the thyroid gland is working. Till the date, available tests include the T3, T3RU, T4, and TSH. Mostly these tests are recommended by an endocrinologist who is the first ones to spot the symptoms of thyroid related diseases. Log on to Marham to find the best Endocrinologist in Karachi.
Also Read: 5 Best Endocrinologists In Karachi
When it is Needed?
Thyroid function test may be recommended by an endocrinologist, if a patient is thought to have overactive thyroid which is called as hyperthyroidism, underactive thyroid which is called hypothyroidism, or needed to monitor the effectiveness of either thyroid-suppression or hormone replacement therapy. It may also recommend checking the presence and severity of thyroid diseases, such as atrial fibrillation and anxiety complication. Following apparent symbols may help endocrinologist to recommend the thyroid function tests. Marham can help you finding endocrinologists in Lahore.
In the case of hyperthyroidism:
- Weight loss
- High levels of anxiety
- A sense of being on a high
While in case of hypothyroidism symptoms may include
- Weight gain
- Lacking energy
How is it Performed?
A simple procedure is followed for thyroid function tests. A patient is only required to withdraw a little volume of blood which is tested for checking the thyroid hormone level.
What Does It predict?
Results of T4 and TSH
The T4 test and the TSH test are the two most common thyroid function tests which are commonly performed to check the thyroid functions. They’re usually performed together.
Increased level of T4 indicates an overactive thyroid (hyperthyroidism).
The TSH test measures the level of thyroid-stimulating hormone in person blood. The normal test range for this test is 0.4 and 4.0 milli-international units of hormone per liter of blood (mIU/L). If a person has signs of hypothyroidism and has a TSH result above 2.0 mIU/L, he is at risk of progressing hypothyroidism.
Results of T3
The normal range for the T3 test is 100-200 nanograms of that hormone per deciliter of blood. Abnormally high levels most commonly happen in the abnormality called Grave’s disease.