Thyroid test, aka Thyroid function test consists of a series of blood tests. They’re used to assess the normal functioning of your thyroid gland. In Greater Kailash (GK), Delhi a typical thyroid test includes T3, T4, and TSH.
The thyroid gland is located in the lower part of your neck and on the front side. It’s a small gland whose primary function is to help regulate the working of numerous body processes like metabolism, energy generation and mood formation.
The thyroid gland is responsible for the production of two prime hormones namely triiodothyronine (T3) and thyroxine (T4). Sometimes, the thyroid gland fails to sufficiently produce these hormones. In such scenarios, you may run into symptoms like weight gain, fatigue and depression. This condition is referred to as hypothyroidism.
On the other hand, when your thyroid gland produces these hormones in excess, you may come across symptoms like unplanned weight loss, high anxiety levels, tremors, diarrhea and a feeling of constantly being on a high. This condition is known as hyperthyroidism.
In most cases, a doctor who you consult on being concerned about your likely abnormal thyroid hormone levels will recommend a broad ranging thyroid test in GK. If the results show unusual levels of T3, T4 and TSH, your doctor will suggest more tests to identify the exact cause of the problem.
Prior to drawing your blood by means of a venipuncture, it’s important that you inform your doctor if you’re on specific medications or pregnant.
This test examines the level of triiodothyronine hormone. This test is normally ordered when tests for T4 and TSH show hyperthyroidism. Your doctor may also ask to conduct T3 test if you’ve got an overactive thyroid gland but your levels of T4 and TSH don’t show any rise. The normal range for T3 is “100 to 200 nanograms of hormone per deciliter of blood (ng/dL)”. Abnormally high levels signify an autoimmune disorder condition known as Grave’s disease related to hyperthyroidism.
A relatively high level of T4 or the thyroxine hormone implies that you’ve got an overactive thyroid gland. A major portion of T4 is affixed to proteins. The remaining small portion is the free T4 which the body actually avails of. Sometimes the level of free T4 is also investigated along with the main T4 test.
It measures the presence of the thyroid stimulating hormone in your bloodstream. The normal range of TSH is "0.4 to 4.0 milli international units of hormone per liter of blood (mIU/L)".
If your TSH level is in excess of 2.0 then you’re subject to the risk of contracting hypothyroidism. In that condition, your doctor in most likelihood will advise you to do thyroid function tests once every year and based on the observation may prescribe medication to alleviate your symptoms.
Both T4 and TSH tests are ordered to be performed regularly on newborns to discern a malfunctioning thyroid gland. This condition, when left untreated, can give rise to a condition of developmental disabilities called congenital hypothyroidism.
If the thyroid test in GK suggests that you’ve got an overactive or underactive thyroid gland, your doctor may propose a thyroid uptake or an ultrasound test. These tests scrutinize structural issues of the thyroid gland, its activity and origination of any tumor that may be leading to problems. Relying on these observations, you doctor may as well investigate a sample thyroid tissue to weigh up any possibility of cancer.
If your thyroid scan shows normal findings, your doctor will probably commend medication for regulating thyroid activity. This will be followed up with some more thyroid function tests to ensure that the prescribed and administered medication is working fine.