Thyroid hormones TSH, T3, T4: preparation, interpretation of the analysis and the norm

The thyroid gland is a small moth located on the human neck. Its dimensions, in comparison with its functions, are small. The whole future of a person depends on the quantity and quality of hormones, whether he will be smart, smart or slow-witted, they will be able to admire him or call him a “gray mouse”.

So, what is hiding behind such a dry abbreviation that decides the fate of TSH, T4, T3. Deciphering them is simple:

  • TSH is an anterior pituitary thyroid-stimulating hormone that controls the secretion of T3 and T4.
  • T3 – triiodothyrotine.
  • T4 – thyroxine.

Triiodothyrotine and thyroxine in the human body perform the following important functions:

  • Increase blood pressure in the body;
  • Add psychological activity;
  • Helps digest proteins
  • Double thinking;
  • Rapid absorption of oxygen by internal organs (except testicles, spleen, brain);
  • Increase the work of the heart;
  • They increase the production of heat in the body.

A decrease in the body’s hormones T3 and T4 can be the cause of:

  • Decreased human intelligence;
  • Pain in the region of the heart, development of SBS;
  • Dullness of heart sounds;
  • Lowering blood pressure;
  • Water retention in the body;
  • Increased sensitivity to stressful situations;
  • Violation of the digestive system;
  • Violations of the secretion of hormones of the genital organs (ovaries in women and testicles in men).

In addition, pregnant women may have frequent miscarriages, underdevelopment of the fetus, and impaired placental metabolism.

After that, you can imagine what a responsible element of the endocrine system is, and its absence – it can be said “the death of a person.” But now medicine does not stand still, it has achieved great success in this direction. People without a thyroid gland live, feel comfortable in society, give birth to healthy, smart and beautiful children.

What is needed for this? And you just need to control the thyroid hormones and, what is very important, correctly select their dosage, undergo regular examinations with an endocrinologist. It won’t take much time, but there are a lot of benefits.

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How to take tests correctly

There are several mandatory rules when taking tests that cannot be neglected.

  1. Analyzes are taken in the morning from about 8 to 10 o’clock and always on an empty stomach.
  2. You should not drink alcohol, as well as abuse smoking, 1 day before the test.
  3. During the day, it is recommended to exclude physical activity.
  4. Emotional and physical state – comfortable and calm.
  5. Cancel the intake of drugs that can disrupt the normal functioning of the thyroid gland, a month before the delivery.

Thyroid hormones in the human body

As a standard, doctors prescribe a blood test for the following indicators:

  • Thyroxine is common and free;
  • Triiodothyrotine total and free.

According to these indicators, you can determine which hormones are not enough for the human body. The TSH hormone also shows whether the body needs hormones. If the TSH levels are higher than the permissible values, it shows that the body lacks hormones. TSH shows a change in the thyroid gland, while other indicators are within the normal range.

Free thyroxine, or in other words thyroxine, is responsible for the concentration and stimulation of proteins in the blood plasma. It shows whether the thyroid gland is capable of producing hormones that the human body needs.

Triiodothyrotine free – stimulates the exchange and absorption of oxygen in cells. This analysis helps determine the type of thyroid disease. T3 total indicator – the total amount of free and protein-bound triiodothyronine.

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How to decipher analyzes

Passing tests is not all, it is more difficult to get further – you need to decipher them. To begin deciphering the analyzes, it is worth understanding how the thyroid gland functions, and where the products of its activity come from.

In the results obtained, you will inflate the following indicators: TSH, T4 (thyroxine), T3 (triiodothyrotine), AT-TG (antibodies to thyroglobulin), AT to TPO (Antibodies to thyroid peroxidase). What are these signs and what do they show.

T3 (triiodothyrotine) is a thyroid hormone responsible for the correct redox balance between the cell space in the human body.

T4 (thyroxine) – has similar functions as T3, but they are also involved in protein metabolism in the body. This hormone is much more active than T3. T4 and T3 are needed for the human body in the same amount.

Thyroid function increases if T4 and T3 are secreted in larger quantities than necessary. This leads to tachycardia, tremor of the arms and legs, a lag in weight gain, a person’s body weight is significantly inferior to that of their peers, elevated body temperature, and persistent subfebrile condition. All of these symptoms signal diffuse toxic goiter, Cr (cancer) of the thyroid gland, inflammation of the thyroid gland.

If hormones are produced little, then all the symptoms are reflected in the reverse order. Its signs are bradycardia, hypothermia, lethargy, drowsiness, apathy, fatigue syndrome, which indicates a lack of vital substances in the body for normal functioning.

Anti-TPO antibodies are indicators of the control of antibodies to thyroid enzymes in the blood. A large number of antibodies in the human body indicates autoimmune diseases, that is, a decrease in human immunity, increased sensitivity to infections.

The next type of antibody is AT-TG. If an increased content of antibodies is indicated in the analysis for hormones, then here it is possible to identify the nature of the violation and find the best methods of treatment.

TSH is the most recent test indicator. This hormone is secreted in the brain, but not in the thyroid gland and controls its work in the body. TSH allows you to stimulate the thyroid gland and work stably. If for a moment imagine that TSH is not in the human body, then how did the thyroid gland work? And it would be the following, when iodine entered the body, the thyroid gland worked, but with its lack or cessation of iodine intake, the thyroid gland went into a state of rest.

TSH is produced in low amounts when the thyroid gland functions much more actively than it should. At a time when the thyroid gland is not working at full strength, the TSH hormone is produced in larger volumes than is necessary for the human body. Changes in TSH depend both on the pathologies of the thyroid gland and on the functioning of the brain (in this case, a brain tumor will not be an exception).

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Norms of indicators of hormones

When receiving the results form, pay attention to the following point: in different laboratories, the results of the analysis may vary slightly. In this regard, it is worth paying attention to the normal values ​​that should be in the results. If there are no indicators of the norm, then the following “cheat sheet” of norms will help you, in which …

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