Thyroxine or T4 is a major hormone among the two produced by the thyroid gland. Free Thyroxine Index (FTI) is an estimation of the free T4 concentration.
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Your next query might be the Free Thyroxine Test price. You are indeed getting the best deal by AreYouHealthy. We are offering the FT4 test at low rate. And the price is inclusive of all charges. You need not to pay even a paise more than the price being reflected on the screen.
FT4 Test in India is provided by a ton of agencies, but we are providing it at the most affordable price point. All the tests booked on our portal are carried forward by India’s #1 Preventive Health Care industry that is Thyrocare. Some of the most reputed certifications like ISO 9001, NABL, CAP, ISO 27001 & NGSP (For HbA1c) are awarded to the Thyrocare Labs.
The thyroid gland is a butterfly-shaped shaped small gland found in the windpipe in the lower neck region. It produces Thyroxine (T4) and Triiodothyronine (T4), two major hormones in the body. These two combinedly help in controlling the rate at which the body consumes energy. The Free Thyroxine (FT4) test measures the total amount of T4 in the blood.
The T4 hormone is found relatively inactive, but it is transformed to the much more active T3 when reaches the liver or other tissues. The feedback system that our body uses to maintain the right quantity of Thyroid hormones in the blood regulate the T4 levels. The feedback system also includes T3 and TSH which stands for Thyroid Stimulating Hormone, along with TRH (Thyroprotein Releasing Hormone), which is a product of hypothalamus.
In response to the TRH stimulation, the pituitary gland produces Thyroid Stimulating Hormone or TSH after the decrease in the levels of thyroid hormone in the blood. The counteraction of TSH is to stimulate the thyroid by binding the TSH receptor to release T4 and T3.
When the blood gets enriched of hormone levels. The pituitary gland regulates the TSH production and produces less amount of TSH, and the Thyroid gland also produces less T4 and T3 in response.
Symptoms of hypothyroidism like weight gain, cold intolerance, irregular menstruation, dry skin, and fatigue are seen in the person having the insufficient T4 and T3 production (underactive thyroid) in the body. These problems occur due to thyroid dysfunction or insufficient TSH.
Overactive Thyroid leads to a disease called hyperthyroidism. Symptoms such as anxiety, weight loss, sleeping difficulty, rapid heart rate, irritated eyes and in some cases, bulging eyes, puffiness around dry and tremors are related to hyperthyroidism. The Free Thyroxine (FT4) test detects the effect of these conditions on the thyroid hormone production.
The test result can show levels of free T4 hormones to be high, low or in the range. The high free T4 results mean an overactive Thyroid Gland which is known as Hyperthyroidism. The low free T4 levels point to Hypothyroidism or an underactive thyroid gland.
Free Thyroxine Index or FTI is used to estimate the free T4 concentration. FTI which is sometimes referred to as T7 is a calculated value determined from the total T4 test along with some evaluation of the level of thyroid hormone binding proteins.
What are the preparations required for the Free Thyroxine (FT4) Test? Is Fasting required?
No need to prepare for the test. The FT4 test can be undergone anytime. One thing to keep in mind is that if you are under medications, then please let the test provider know about that. Sometimes there are some medicines which may affect the test results.
Sample Required: 4ml Blood
Collection process: Collection of blood from Vein (Venipuncture). Collected usually from the arm.
How to make the payment for the Free Thyroxine (FT4) Test?
All the amount needs to be paid to the visit sample collector after the sample collection is done. No payment before that. Not even any extra charge.
Need any assistance regarding the Free Thyroxine (FT4) Test? Anything left in your mind to be cleared? We are available on our customer support number 7289-87-6363. Our 24×7 team will feel happy to assist you.
FASTING TYPE: NON FASTING
SAMPLE TYPE: SERUM
NORMAL RANGE: 0.70 – 1.80