Blood test results related to thyroid function

Blood tests not only tell about bio-bio bio bioeeration indicators, but also evaluate armor functions such as TSH, FT3, T4, TSI,… Based on these indicators, the doctor can diagnose and give a treatment regimen suitable for each specific disease condition.

1. Functions of the thyroid gland

The thyroid gland is a small step-shaped end ende secreted gland, located adjacent to the administration in the front of the neck. The thyroid gland plays an important role when secreting hormones such as Tri-thyronine (T3) and thyroid hormone Thyroxine (T4) that help regulate the activity of body tissues and cells.

thyroid function

The thyroid gland is located just in front of the neck

2. Tests for evaluation of thyroid function

There are many types of tests that evaluate thyroid function, depending on the history of the disease as well as symptoms, which doctors will prescribe tests that evaluate thyroid function as follows:

Thyronxine (T4)

T4 is essentially a reserve hormone and is incapable of producing energy or transporting oxygen to cells in the body. To become T3, T4 must undergo de-iode and lose 1 iode atom.

A full T4 test is a method performed to measure the amount of thyroxine currently circulating in the patient's blood. This method is often used in the diagnosis of measurement of thyroid function. However, the full T4 measurement test may be affected by the amount of protein in the blood, specifically the protein that can bind red blood cells to T4 to turn T4 into an active form. Meanwhile, free T4 is considered an active form of thyroxine that is not affected by proteins in the blood.

Currently, in the diagnosis and control of thyroid diseases, many ende historians do not use free T4 or full T4 dosing tests but only use TSH test results.

Triiodothyronine (T3)

T3 is an active form hormone produced by T4's de-iode process. Similarly, a full T3 test measures the entire amount of Triiodothyronine in the blood (including non-binding and protein-binding T3). The free T3 test measures only the amount of T3 that binds to the protein – the T3 form capable of transporting energy and oxygen to the cell.

RT3 or T3 reversal is much secreted during times of stress, stress in the form of inactivity. Because there is little clinical significance, RT3 testing is generally less in dinhable. However, the RT3 test is important in determining thyroid hormone imbalances.

Thyroid stimulating hormone TSH

TSH is a hormone in the quiet gland that transmits signals to the thyroid gland. Specifically, when the still gland detects too much thyroid hormone in the blood, it will limit the production of TSH so that the thyroid gland reduces the production of thyroid hormones. On the contrary, when the still gland detects in the blood there are too few levels of thyroid hormone, it will actively produce TSH to promote thyroid hormone production.

Thyroid peroxidase antibody (TPOAb)

TPOAb is an antibody produced by the body, which accidentally attacks and destroys healthy thyroid tissue, which is functioning normally. Thyroid function tests show the existence of TPOAb antibodies in the blood, which means that the body has suffered from one of the thyroid autojuncular diseases such as Grave or Hashimoto's thyroiditis.

Thyroid-stimulating immunoglobulins (or TSI) are antibodies capable of stimulating thyroid activity and promoting the production of excessive amounts of thyroid hormones into the bloodstream.

Thyroglobulin (Tg)

Tg is a protein produced by the thyroid gland. The Tg test is generally in place to be valid for patients diagnosed with thyroid cancer to:

  • Check if, compared to before cancer treatment, cancer cells still produce Tg.
  • Evaluate the effectiveness of the cancer treatment process.
  • Assess the risk of recurrence of cancer after treatment.

Thyroglobulin antibodies (TgAb)

TgAb is an antibody produced in response to the presence of Thyroglobulin in the body. As Thyroglobulin increases abnormally, the body produces TgAb to protect the body from the progress of thyroid diseases.

thyroid test

There are many types of tests to diagnose thyroid diseases

3. Results in blood tests related to thyroid function

Blood test results related to thyroid function are considered completely normal if they are within the following limits:

  • T4 index: 60 – 140 nmol/L
  • T3 Index: 1.1 – 2.7 nmol/L
  • TSH index: 0.4 – 4.0 mU/L
  • FT3 index: 3.5 – 7.8 pmol/L
  • FT4 index: 10 – 26 pmol/L

Clinical implications of results in thyroid function testing

  • Low FT4 and high TSH: acute thyroid failure caused by thyroid disease such as Hashimoto's thyroiditis.
  • FT4 is low and TSH is also low: second-line thyroid failure as a result of a reaction to non-thyroid disease or by a disease associated with the still gland.
  • FT4 increases and TSH is low: hethyroidism such as Basedow's disease (Graves).
  • FT4 is within safe limits but TSH increases slightly: asymptoous insyroidism.

Thyroid automaceous tests such as TgAb, TPOAb or TRAb may be in place in case of suspected autothyroid thyroid disease or initial results show signs of thyroid dysfunction.

When experiencing any symptoms suspected to be related to thyroid diseases such as fatigue, tachycardia, unsusmified weight loss, sweating, eye irritation,… patients should immediately go to reputable facilities to do tests to assess thyroid function, thereby being diagnosed and treated in a timely manner.

Currently, Share99 International Health Hub has a screening package, screening for thyroid diseases. Share99's screening package for thyroid diseases helps:

  • Check thyroid function.
  • Screening & early detection of common thyroid diseases such as: mere goiter, thyroidism, thyroid failure, thyroiditis, thyroid encephalitis, thyroid cancer, … from there, take appropriate and timely treatment.

To register for examination and treatment at Share99, please go directly to Vinmec health system or register for an online examination HERE.

SEE MORE:

  • Normal indicators of thyroid hormones T3, T4
  • Does a child with congenital thyroid disease develop normally?
  • Where is the thyroid gland located and what functions?

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SEE MORE:

  • The role of the reathline in the end noisy system
  • Are you taking thyroid and heart medications to drink Omega 3 fish oil?
  • Is it dangerous to have a thyroid tumour on both sides, 9mm to the left, 17mm to the right?

About: John Smith

b1ffdb54307529964874ff53a5c5de33?s=90&r=gI am the author of Share99.net. I had been working in Vinmec International General Hospital for over 10 years. I dedicate my passion on every post in this site.

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