What are the three items of Jiagong

With the advancement of modern medicine, people have been able to detect some diseases through advanced examination technology, providing greater protection for people's physical health. There are many contents in medical examinations, among which thyroid function is a very important examination item. It is involved in almost all physical examinations, such as the three thyroid function tests, etc. Let’s take a look at what the three thyroid function tests are?

What are the three thyroid function tests?

The three thyroid function tests are three of the five thyroid function tests, and are indicators that reflect the physiological function status of the thyroid gland. Among them, TSH is the thyroid stimulating hormone secreted by the pituitary gland, and FT3 and FT4 are hormones secreted by the thyroid gland itself.

If TSH is low and FT3 and FT4 are high, it is the most common type of hyperthyroidism (abbreviated as hyperthyroidism) in clinical practice. The cause may be Graves' disease, Hashimoto's disease, subacute thyroiditis, hyperfunctioning thyroid adenoma, etc. Further diagnosis is needed to choose different treatment methods.

If TSH is elevated while FT3 and FT4 are low, it is the most common type of primary hypothyroidism (abbreviated as hypothyroidism) in clinical practice. It can be caused by thyroidectomy, radiation damage, Hashimoto's disease, etc. Generally speaking, thyroid hormone replacement therapy is required.

The three thyroid function tests: free T3, free T4, and thyroid-stimulating hormone (TSH) are indicators for detecting hyperthyroidism. They are not much different from the five thyroid function tests. Six or more thyroid function tests are helpful for classifying thyroid diseases such as hyperthyroidism and hypothyroidism.

In addition to typical hyperthyroidism, common clinical conditions include:

(1) T3 hyperthyroidism. T3 hyperthyroidism refers to a type of hyperthyroidism in which the patient has clinical manifestations of hyperthyroidism, but serum TT4 and FT4 are normal or even low, with only T3 elevated.

(2) T4 hyperthyroidism. Also known as thyroxine-type hyperthyroidism, it refers to a type of hyperthyroidism in which serum TT4 and FT4 are elevated, while TT3 and FT3 are normal. In 1975, Turner first reported the name of T4 hyperthyroidism, and its clinical manifestations are the same as those of typical hyperthyroidism.

(3) Childhood hyperthyroidism. The incidence rate gradually increases after the age of 3, with the highest incidence rate at 11-16 years old. Girls are more likely to have more cases than boys. Almost all children have diffuse thyroid enlargement and typical hypermetabolic syndrome, and exophthalmos is more common.