What do FT3 and FT4 mean?

FT3 and FT4 are the English abbreviations of serum free triiodothyronine and serum free thyroxine, respectively.

FT3 and FT4 are the most sensitive indicators for the diagnosis of hyperthyroidism, and because their content is not affected by thyroid-binding globulin, they have important application value in the diagnosis of hyperthyroidism and hypothyroidism, the evaluation of disease severity, and the monitoring of efficacy.

As long as you remember that the letter t followed by the number 3 or 4 are thyroid hormones (including T3, FT3, T4, and FT4). As long as these indicators exceed the normal reference value, it indicates that there is too much thyroid hormone, which is commonly known as "hyperthyroidism"; If it is lower than the normal range, it means that the thyroid hormone is insufficient, which is called "hypothyroidism".

The complete set of thyroid function includes T3, T4, FT3, FT4, and TSH, which are triiodothyronine, thyroxine, and free three, respectively.

Iodothyronine, free thyroxine, serum thyroid-stimulating hormone. The pituitary gland secretes TSH, which acts on the thyroid gland, and the thyroid gland synthesizes T4 T3, T4 is all synthesized and secreted by the thyroid gland, and T3 is only 20% made up of.

Synthetic secretion of the thyroid gland, 80% of which is converted from T4 in the peripheral blood. Normally, the blood circulation is T4

Bound to the corresponding protein, only the free is FT4; In the same way, there is only one free t3, which is ft3. The storage and transport forms are bound to proteins, and the free ones are active.

Partly, it directly reflects the functional status of the thyroid gland and is basically not affected by serum protein concentration (for example, due to the increase in protein during pregnancy, thyroxine is also increased, but FT3 and FT4 are basically not affected), so it is sensitive in the diagnosis of hyperthyroidism.

Feel; T4, on the other hand, reflects the overall synthetic function of the thyroid gland.

The human body's thyroxine binds thyroxine and free thyroxine, and thyroxine only works in the free state, so free thyroxine can truly reflect thyroid function, and FT3 FT4 is free thyroxine

All thyroid function tests are available.

FT3 is free thyroid triiodonine, FT4 free thyroxine, both of which belong to thyroid hormones; TSH is a thyroid-stimulating hormone.

I don't even understand what that means. What is the industry? Excuse me.

T4 refers to coming.

Serum total thyroxine, T3 is serum total triiodoforma.

Self-shaped adenonine.

bai。It is the most basic screening index for judging thyroid function. T4 and DAOT3 in Zhi serum

More than 99% of the test results are bound to proteins (mainly thyroxine-binding globulin - TBG), so the physiological and pathological conditions affecting TBG must also be considered when determining the test results.

FT4 and FT3 are active parts of the circulating thyroid hormone in the blood, which are not affected by TBG and truly directly reflect the functional status of the thyroid gland. The sensitivity and specificity are significantly higher than those of T3 and T4, and have been widely used in clinical practice. It can replace T3 and T4.

BAIT4 refers to the serum total thyroid gland.

T3 is serum total triiodometrinine. It is the most basic basis for judging thyroid function.

This is a filter metric. More than 99% of T4 and T3 in serum are bound to proteins (mainly thyroxine-binding globulin--TBG), so the physiological and pathological conditions affecting TBG must also be considered when determining the test results.

FT4 and FT3 are active parts of the circulating thyroid hormone in the blood, which are not affected by TBG and truly directly reflect the functional status of the thyroid gland. The sensitivity and specificity are significantly higher than those of T3 and T4, and have been widely used in clinical practice. It can replace T3 and T4.

Hello, thyroid function is used to detect thyroid function. According to the results of your five nail skills, take the test.

Concern about your condition is the version of hyperthyroidism, i.e. hyperthyroidism. To be precise, the serum FT4 concentration in patients with T4 hyperthyroidism (also known as thyroxine hyperthyroidism) is significantly higher and the FT3 concentration is normal. Hyperthyroidism is a group of common endocrine disorders caused by excessive thyroid hormone secretion caused by a variety of causes.

The most common types are T3 hyperthyroidism and T4 hyperthyroidism.

TT3 is total triiodothyronine, TT4 is total thyroxine, FT3 is free triiodothyronine, and FT4 is free thyroxine.

TT3 is the main biologically active thyroid hormone. The vast majority of T3 in serum (binds to specific proteins in plasma, and only a very small number are in a free state (. Changes in serum TT3 concentrations indicate abnormalities in thyroid function.

T4 in serum in TT4 is present in a protein-bound form, 90% of which is bridged to thyroid hormone-binding globulin (TBG), which is measured by TT4.

FT3 is one of the most sensitive indicators for the diagnosis of hyperthyroidism, because its content is not affected by thyroid-binding globulin, so it has important application value in the diagnosis of hyperthyroidism and hypothyroidism, the evaluation of disease severity, and the monitoring of efficacy.

FT4 is also known as serum free thyroxine, the medical term, thyroxine is a hormone synthesized and secreted by thyroid follicular cells, released into the blood circulation in a free form, most of which quickly bind to plasma proteins.

Thyroid-stimulating hormone (TSH), total triiodothyronine (TT3), total thyroxine (TT4), free triiodothyronine (FT3), free thyroxine (FT4), these are the five items of thyroid function.

Significance of determination: 1. Thyroxine (T4): Lahui.

Hyperthyroidism, subacute thyroiditis, early stage of chronic lymphoid thyroiditis, high T4 when taking a large amount of thyroxine or accidentally ingesting the thyroid gland of animals; There are no symptoms of hyperthyroidism when the tissue is not sensitive to thyroid hormones, but peripheral blood T4 is elevated.

It can lead to low T3 syndrome, and in severe cases, T4 is also reduced, and if T4 is significantly reduced, it indicates that the disease is critical, and the prognosis is poor.

2. Triiodothyronine (T3):

The clinical significance of the assay is basically the same for the diagnosis of hyperthyroidism, and the monitoring of hyperthyroidism after **, which is more sensitive than T4, and it is a specific diagnostic indicator for T3 hyperthyroidism.

3. Free t3 (f t3):

The FT3 measurement is not affected by TBG and is a sensitive indicator of thyroid function.

4. Free thyroxine (F t4):

The FT4 assay is not affected by TBG and is a sensitive indicator of thyroid function.

FT3, also known as serum free triiodothyronine (free T3), is the most sensitive indicator for diagnosing hyperthyroidism, because its content is not affected by thyroid-binding globulin, so it has an important application value in the diagnosis of hyperthyroidism and hypothyroidism, disease severity assessment, and efficacy monitoring.

Abbreviation]FT3

Clinical significance] is the same as "T4", but its content is not affected by thyroid-binding globulin, which can specifically reflect the functional status of the thyroid gland, and has high application value for judging thyroid dysfunction, especially for hyperthyroidism, which is a sensitive and specific index. Reference value: 4-10pmol ml.

Diagnosis of T3 hyperthyroidism, diagnosis of T3 hyperthyroidism, diagnosis of primary hypothyroidism and low T4 syndrome, differentiation of T4 hyperthyroidism and high T4 syndrome, observation of the efficacy of hyperthyroidism, guidance of hypothyroidism, diagnosis of non-thyroid diseases.

FT4 is a hormone synthesized and secreted by thyroid follicular cells, which is released into the blood circulation in a free form, and most of it is rapidly combined with plasma proteins.