Why do you test for TSH T3 and T4?

A T3 test is most often used to diagnose hyperthyroidism, a condition in which the body makes too much thyroid hormone. T3 tests are frequently ordered with T4 and TSH (thyroid stimulating hormone) tests. A T3 test may also be used to monitor treatment for thyroid disease.

What diagnosis can be used for TSH?

You may need a TSH test if you have symptoms of too much thyroid hormone in your blood (hyperthyroidism), or too little thyroid hormone (hypothyroidism). Symptoms of hyperthyroidism, also known as overactive thyroid, include: Anxiety. Weight loss.

What happens when FT3 and FT4 is high?

According to FT3 and FT4 results which are high or low, you can directly determine the hyperthyroidism or hypothyroidism. The biggest feature of TSH is the opposite of FT3 and FT4, which the higher the FT3 / FT4, the lower the TSH.

What is T3 T4 TSH symptoms?

High amounts of T4, T3, or both can cause an excessively high metabolic rate. This is called a hypermetabolic state. When in a hypermetabolic state, you may experience a rapid heart rate, elevated blood pressure, and hand tremors. You may also sweat a lot and develop a low tolerance for heat.

What is the cause Graves disease?

Graves’ disease is caused by a malfunction in the body’s disease-fighting immune system. It’s unknown why this happens. The immune system normally produces antibodies designed to target a specific virus, bacterium or other foreign substance.

What can affect TSH levels?

Concomitant diseases, medications, supplements, age, gender, ethnicity, iodine status, time of day, time of year, autoantibodies, heterophilic antibodies, smoking, and other factors influence the level of TSH, or the performance of current TSH assays.

What type of disorder is Graves disease?

Graves’ disease is an immune system disorder that results in the overproduction of thyroid hormones (hyperthyroidism). Although a number of disorders may result in hyperthyroidism, Graves’ disease is a common cause.

What is FT3 blood test?

The test measures the amount of free triiodothyronine, or FT3, in your blood. T3 is one of two major hormones produced by the thyroid gland (the other hormone is called thyroxine, or T4). T3 makes up less than 10 per cent of what we call thyroid hormone, while T4 makes up the rest.