For Recruitment questions, contact the County of Santa Clara Human Resources at (408) 299-6816. For Health and Hospital related recruitments, contact the Santa Clara Valley Health and Hospital System Human Resources at (408) 885-5450.
The T4 test is known as the thyroxine test. The TSH test measures the level of thyroid-stimulating hormone in your blood. These are the two most common thyroid function tests and are usually ordered together. They are routinely performed on newborn babies to identify a low-functioning thyroid gland.
Thyroid hormone blood tests include: 1  Total thyroxine (T4). 2  Most of the thyroxine (T4) in the blood is attached to a protein called thyroxine-binding globulin. 3  Less than 1% of the T4 is unattached. 4  A total T4 blood test measures both bound and free thyroxine.hyroid hormone tests are done to: 1  Find out what is causing an abnormal thyroid-stimulating hormone (TSH) test. 2  For more information, see the topic Thyroid-Stimulating Hormone (TSH) . 3  This is the most common reason for thyroid hormone tests. 4  Check how well treatment of thyroid disease is working.