What Are the Different Types of Thyroid Blood Tests?
The three types of thyroid blood tests are the total thyroxine test, the free thyroxine test and the triiodothyronine test. Each of these tests can determine whether the thyroid is releasing the appropriate number of hormones in the body. The blood tests also can be used to monitor whether a thyroid treatment plan is working and can be a first step in determining whether thyroid diseases or disorders are present. The thyroid gland is located in front of the trachea, or windpipe, and below the voice box. Iodine from food is used to make hormones called thyroxine and triiodothyronine, also known as T4 and T3, respectively. The thyroid stores and releases these hormones as the body needs them.
