0 Total Test


Thyroid Function Test

What is this test? 

Thyroid Function Test panel measures the levels of overall thyroxine T-4, general triiodothyronine T-three and thyroid stimulating hormone (TSH) in blood.

What is Thyroid Stimulating Hormone?

These hormones assist to control the fee at which power is utilized in nearly every tissue inside the body.

What are T4 and T3 Hormones?

Thyroxine (T4) and Triiodothyronine (T3) which can be secreted into the blood binds reversibly to the transport proteins like thyroxine-binding globulin (TBG), thyroxine binding prealbumin (TBPA), and albumin. Remaining unbound T4 and T3 circulates freely in blood and used by the frame.

This freely circulating Thyroxine (T4) and Triiodothyronine (T3) are called Free Thyroxine FT-four and Free triiodothyronine FT-three.

What are Hyper and Hypothyroidism?

This test is accomplished to degree whether the thyroid gland is hyperactive (Hyperthyroidism) or underactive (Hypothyroidism).

Hyperthyroidism is a condition wherein thyroid gland produces excessive hormones. This situation can also motive signs and symptoms together with weight loss, irritability, sweating, and abnormal heartbeats. Hypothyroidism is a circumstance wherein thyroid gland does no longer produce enough hormones.

This situation may additionally purpose weight advantage, dry pores and skin, constipation, feeling bloodless and sluggish heart charge. Your physician may additionally ask you to undergo this check in case you showcase any of these signs or symptoms.

Why This Test is Done?

The doctor may ask to get this check carried out if the affected person is suffering from signs like unexplained weight loss or weight gain, fatigue, weak spot, issue in concentrating that are commonplace signs and symptoms of thyroid issues. In a few instances, this check is finished to discover the effectiveness of the remedy. If a patient is on the treatment of synthetic thyroid hormones then the health practitioner prefers this take a look at to evaluate and to test the thyroid hormone degrees inside the frame. This enables the physician to rule out the patient’s disease circumstance.


Drugs like amiodarone, thiourea, lithium, phenylbutazone, sulfonamides and start manage tablets may additionally alternate the levels of Total Thyroxine T4 in the blood. Drugs like carbimazole, methimazole may additionally affect the tiers of TSH in blood.

Hence, all medications need to be stated to the physician before present process this take a look at. During pregnancy, T3, T4 tiers may be atypical and commonly, it becomes stabilized after a time frame.

Pathology take a look at parameters:

The Thyroid Profile Total test has the subsequent additives i.E:- Total Thyroxine T4, Total Triiodothyronine T3, and Thyroid Stimulating Hormone TSH. Also referred to as Thyroid Function Tests Total Blood, TFT Total Blood, TFT Total, Thyroid Function Tests Total.

Test Preparation

Inform your doctor if you are on any medications, have any hypersensitive reactions or underlying medical conditions before your T3 T4 TSH. Your medical doctor will give particular commands relying in your condition on the way to prepare for T3 T4 TSH. Fasting is required for about 8-10hrs. Consumption of water is allowed.

Understanding your test results

Understanding your take a look at outcomes If the take a look at outcomes are in regular range then the thyroid gland is functioning commonly and no need for in addition scientific intervention.

In the case of increased T3 and T4 stages within the blood than the everyday range then it may be due to temporary hyperthyroidism, Hashimoto's thyroiditis (an automobile-immune disorder where the immune system of very own frame assaults the thyroid gland and reduces the production of hormones that are required for the body), Grave’s ailment (an immune gadget sickness which ends in the overproduction of thyroid hormones), subacute thyroiditis (acute infection of the thyroid gland), toxic adenoma (accelerated hormone production from single large nodule/lump in the thyroid gland), poisonous multinodular goiter, thyroid most cancers, elevated production of thyroid stimulating hormone.

If the tiers of T4 and T3 are less than the ordinary range then it could be due to hypothyroidism, previous treatment of hyperthyroidism, subacute thyroiditis (acute inflammation of the thyroid gland), neck radiotherapy before the check, iodine deficiency or excessive iodine, pituitary dysfunction, idiopathic myxedema (intense hypothyroidism), tissue resistance to thyroid hormone, hunger, or lengthy-term infection, and so on.

If TSH stages on my own accelerated and T4, T3 tiers are within the range then it is able to be due to slight hypothyroidism. In case of reduced levels of TSH, it is able to imply hyperthyroidism. If all of the 3 TSH, T4 and T3 levels are low then it could be resulting from nonthyroidal infection or pituitary hypothyroidism.


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