Sooner or later all people have to take the indicators for thyroid hormones. Depending on how well the patient prepared to take blood to check certain reference values, the exact result of the thyroid hormone( T4 free or TSH) level will be revealed.
Everyone should be well informed about how to properly donate blood, about preparing for this procedure and about how much to prepare for testing. Many women are interested to know - on what day of the monthly cycle should I take TTG or T4, T3 free, so that the blood tests show up as correctly as possible? This article will reveal all the answers to questions regarding the preparation for the delivery of thyroid hormone tests.
Norm of reference value indicators
Thyroid hormones produce 5 major hormones. If you suspect a disease, a certain analysis is given.
Thyroid stimulating hormone
A thyroid-stimulating hormone( TTG) is an important indicator in the test, as it is produced by the pituitary itself, responsible for the entire thyroid gland. His analysis should be carefully prepared. The obtained reference values of the analyzes will tell a lot.
- if TTG is below normal, then this may indicate hyperthyroidism or hyperthyroidism;
- if after the delivery of the analysis it turns out that TSH is elevated, this indicates that the thyroid gland produces insufficient amount of hormones, and the pituitary gland shows excessive activity.
Usually high ttg indicates:
- hypothyroidism;
- adrenal disease;
- mental disorders.
Women give up on any day of the menstrual cycle, on an empty stomach. The normal limits of TSH are from 0.4 to 4.0 mU / liter.
Triiodothyronine common
General triiodothyronine( T3) analysis is done to determine hyperthyroidism, and also during hormonal replacement therapy with L-thyroxine.
- The high content of reference values in the blood indicates thyrotoxicosis or thyroid insufficiency.
- If triiodothyronine is elevated during pregnancy, then this is not a deviation.
- If blood tests produce low triiodothyronine, this indicates hypothyroidism.
Older people have their own norms for triiodothyronine, because with age, it gradually decreases. There is also an analysis for free triiodothyronine.
Elevated blood levels of the patient may indicate:
- chorio-carcinoma;
- liver disease;
- toxic goiter.
Lack of free hormone indicates:
- hypothyroidism;
- depletion;
- strong physical overvoltage.
Analysis for free and total triiodothyronine is given by women on any day of the menstrual cycle on an empty stomach. Normal limits are from 2.6-5.7 pmoles per liter ( not bound by T3).
Thyroglobulin
Thyroglobulin( AT-TG) analysis should be submitted:
- if there is a suspicion of thyroid cancer;
- for hepatitis or cirrhosis of the liver.
Elevated thyroglobulin levels in the blood may indicate hyperthyroidism, thyroid cancer and autoimmune thyroiditis.
Check women's reference values on any day of the menstrual cycle on an empty stomach. Normal boundaries are from 0 to 18 units per milliliter.
Total and free T4
Elevated free and total T4 values indicate:
- hyperthyroidism;
- thyrotoxicosis;
- toxic goiter.
The reduced values of free and total T4 indicate hypothyroidism. If a woman takes a combined oral contraceptive or a person is in a state of chronic nervous tension, the hormone levels will be distorted, and these factors must be taken into account.
The obtained value in the blood of the tested patient free T4 indicates the quality of metabolic processes in the human body. Women can take T4 indicators on any day of the menstrual cycle on an empty stomach. A more informative value is considered free T4, rather than general. Normal values are from 9 to 22 pmol per liter ( not bound by T4).
Assay for antibodies
Antibodies to thyroid peroxidase or microsomal bodies( AT-TPO) are tested in the patient's blood in order to detect autoimmune diseases of the thyroid gland. Girls can take the test on any day of the menstrual cycle on an empty stomach. A value of up to 5.6 units per milliliter.
The given data on the limits of units of measurement in testing are individual for any of the laboratories, where you can check. Each laboratory has its own indicator markers, so the norm is usually indicated on the liner sheet with the test results. After what time the result will be known depends on the laboratory itself, because there are no clear boundaries in this matter.
How to prepare for the delivery of the
tests First you need to know the common errors of patients preparing for such a procedure. Many girls are worried - how important it is to take tests on a certain day of the menstrual cycle, and on which ?In this case, there is absolutely no need to try to test their indicators depending on the specific day of the monthly cycle, because all without exception the reference rates, both in the male and in the female, are the same. There are two exceptions:
- girls are in a state of pregnancy, because their content is increased;
- in elderly people, on the contrary, thyroid hormones are lowered.
To properly check the thyroid hormones, you must carefully prepare, so as not to distort the results:
- No later than a month before the date of the proposed test, the taking of drugs for hormone replacement therapy( TTG, T4, T3) is canceled, but if according to the advice of the treating endocrinologistpossibility to make cancellation, then this item should be omitted.
- At least 3 days before the date of the test for thyroid hormones, the intake of iodine-containing drugs, minerals and special foods is also canceled.
- The day before the check, you should not drink alcohol and smoke , or you can not attend classes at the gym.
- Before the procedure, the patient should stay at least half an hour at rest and not worry about anything. To check correctly, you must take the test on an empty stomach, you can drink only water. Studies using radiopaque means should be carried out after the test.
- The best way is to sutra between 8 and 10 o'clock or before lunch.
- To get everything right, you can eat no earlier than 12 hours before the scheduled procedure.
- If the patient is taking aspirin, corticosteroids, combined oral contraceptives or potent sedatives, this must be reported to the laboratory. It is advisable to cancel the reception of this type of drugs on the eve of testing, but if it is not possible - to do this, then be sure to inform the doctor.
When should I take these tests?
Analyzes for these hormones are dealt in several cases.
- girls have severe malfunctions of the monthly cycle;
- miscarriages in the sexual development of adolescents, lag in mental and physical development from peers;
- hyperthyroidism, hypothyroidism, various types of goiter;
- arrhythmia of the heart;
- alopecia( alopecia) with normal androgen content to the body;
- infertility in girls without obvious violations of the menstrual cycle;
- impotence in men or primary frigidity in girls for no apparent reason;
