Triiodothyronine is secreted by the cells of the thyroid gland. The concentration of free triiodothyronine is approximately 0, 25% of the total content of hormone in the blood. In hyperthyroidism or not enough iodine, the concentration of a substance may be higher.

Why the need for triiodothyronine in the body

A lack or excess of triiodothyronine in the body affects all the processes of life. Ingredient plays a special role in the processes of differentsirovki and neonatal development of the nervous system. Also for the functioning of the Central nervous system requires optimal levels of triiodothyronine in the body. It activates the reticular formation and cortical processes. In addition, the hormone has a positive effect on the heart.

Triiodothyronine enhances basal metabolic rate, increases heat production and oxygen consumption in all tissues of the body. The exception are only the brain tissue, spleen and testicles. Thyroid hormones stimulate the synthesis of vitamin A in the liver, contribute to the acceleration of protein metabolism, alter lipid metabolism, reduce the concentration of cholesterol and triglycerides in the blood. Ariadne hormones are a necessary component for normal bone metabolism. However, an excess of triiodothyronine in the body, promotes bone resorption, increases calcium excretion in the urine.

How to prepare for the delivery of triiodothyronine

Approximately one month before the study to exclude the reception of the thyroid hormones (under a doctor). A few days prior to the examination you will need to avoid taking drugs containing iodine. Blood sampling is usually carried out before the x-ray contrast studies. On the eve of the delivery of triiodothyronine to avoid exercise and all sorts of stressful situations. Before the procedure the patient should be at rest at least an hour.

When assigned to the analysis

The analysis on the content in the body triiodothyronine may be appointed for different reasons. For example, this procedure can be administered in the case, if the TSH level is lowered in normal levels of free thyroxine. Often people give analysis on the content of triiodothyronine if symptoms of hyperthyroidism and a normal level of thyroxine. Symptoms of hyperthyroidism include weight gain, irritability, palpitations, diarrhea, weakness and other factors. Sometimes, the analysis is carried out at an asymptomatic increase in the level of T4 hormone in the body. This can occur when euthyroid.