Why thyroid function tests are important?
Thyroid function tests are blood tests performed to measure how well your thyroid gland is working. The tests include TSH, T3, T3RU, and T4. The thyroid gland located at lower-front part of your neck. In general, it is responsible to regulate different body process, like generation of energy, metabolic process, and mood. Mostly thyroid gland produce two hormones, called triiodothyronine (T3) and thyroxine (T4). When your thyroid gland will unable to produce enough hormones, you may get consistently sign and symptoms, such as major depression, lack of energy, and weight gain. This acute health condition called as hypothyroidism.
But when your thyroid gland produces so much of these hormones, you may got serious symptoms, like tremors, anxiety, weight loss, difficulty falling asleep, diarrhea, premature ejaculation, and excessive hunger. This acute health condition is called hyperthyroidism. Your doctor may recommend you series of thyroid screening tests, likeT4 or the thyroid-stimulating hormone (TSH) test to confirm thyroid hormone levels.
How your blood sample collected for thyroid function tests?
Your blood sample collected by a procedure called venipuncture. In general, venipuncture performed in a lab or doctor’s clinic. They may tell you to sit comfortably in a chair or lie down on bed. Discuss with your doctor regarding any medications that you have taken, and if you are pregnant. Certain medicines and pregnancy may affect test results. During sample collection a lab technician or nurse will tie a rubber band tightly around your upper arm so that the veins will properly swell with blood. Then, they will insert a sharp needle into the particular vain, once they found it on your skin. When this needle punctures the skin to obtain blood sample, you will feel a sharp prick. Next, they will collect blood sample in a sterilized test tube and you sample will be sent to diagnostic laboratory for further testing process.
What is a reports for thyroid function tests mean?
The most common thyroid function tests are T4 and TSH. In general, these ordered together to identify your thyroid gland complications. They identify you as a hyperthyroidism patient, if high level of T4 indicated. THS test performed to measure thyroid-stimulating hormone level in your blood. The normal range of TSH is about 0.4 and 4.0 milli-international units of hormone per liter of blood (mIU/L). The suspected case of hypothyroidism is above 2.0 mIU/L of TSH readings. Doctor may recommend you to do thyroid function tests at least every other year going forward. T4 and TSH tests performed routinely on newborn babies for identification of low functioning thyroid glands. If not treated in earlier stages for your baby, it causes congenital hypothyroidism. The disease is major cause of developmental disabilities.
T3 test performed to check the triiodothyronine hormone level in your thyroid gland. This test is recommended, when T4 tests and TSH tests suggest hyperthyroidism. It often ordered, if you have overactive thyroid gland problems. In general, normal range for the T3 is 100-200 nanograms of hormone per deciliter of blood. Abnormal level of T3 indicates Grave’s disease, which is an autoimmune disorder.
T3 Resin Uptake test performed to measure thyroxin-binding globulin (TBG) level. Elevation of T3 level results TBG level low. Abnormally high level of TBG indicates various disorders in kidneys and with the body, often not getting enough protein.