Why give blood for hormones TSH, T4

Thanks to the results of blood tests a doctor can diagnose, differentiate, predict the course of disease. Analyzes on hormones is prescribed for the identification of possible abnormalities in the endocrine glands. Determine the level of TSH and T4 refers to the hormonal study of the blood.

The General concept about hormones

Hormones are biologically active substances that are formed in the glands of internal secretion. These substances, entering the blood, are precisely in those fabrics which will be subject to them. TSH (thyroid stimulating hormone), T4 (thyroxine) are thyroid hormones. To determine the health of this gland carry out quantitative determination of these hormones in the blood and subsequent interpretation of the results.

Thyroid-stimulating hormone

TSH is a pituitary hormone that has a regulating effect on the synthesis of thyroid hormones. A normal amount of thyroid stimulating hormone is considered to be the interval of 0.2 to 3.2 Miu/L. If you suspect a violation of the thyroid gland by measuring the levels of thyroid-stimulating hormone. If its concentration is increased, it indicates the decrease in gland function. The detection of lower concentrations of TSH in the blood can be assumed about improving thyroid function.

Thyroid hormone T4

Thyroid hormone T4 (thyroxine) is a thyroid hormone, which in blood serum are in two States: bound and free. Carry out the determination of free T4, as its level does not depend on external factors. He is always constant, reflecting a more accurate picture of the thyroid gland. In normal healthy human blood revealed 65-156 nmol/l hormone T4.

The increase in the concentration of free thyroxine in blood serum is noted with increased thyroid function (hyperthyroidism), sometimes with the active thyroiditis or acromegaly. The decrease observed at the primary or secondary hypothyroidism (reduced thyroid function).

Preparations for the research

The analysis on hormones of a thyroid gland is carried out in the morning on an empty stomach. The fence is produced in a treatment room of a medical institution doctor's. At least 24 hours before the test, you must follow a diet that excludes alcohol consumption, cigarettes. The day before the manipulation should eliminate physical exertion, including sex.

Before the test to relax, sit back, relax for 10-15 minutes. Taking blood from the vein should be carried out 12 hours after the last meal. In the morning of the test is permissible to drink a glass of water. Hypothermia and overheating will adversely affect the results of the study. On medication at the time of the study must be reported to the endocrinologist.