What does this panel test for?
This panel checks your blood levels of Free & Total T3, Free & Total T4 & Thyroid-stimulating Hormone (TSH).
Why is this panel important?
This panel helps screen for hyperthyroidism. The TSH, or thyroid stimulating hormone, controls the amount of T4, or thyroxine, produced by the thyroid gland. If you are hyperthyroid, the TSH is generally low although, in rare cases, it can be normal.
T4 is an important hormone secreted by the thyroid. A high T4 level indicates hyperthyroidism, even if the TSH is normal. In cases of mild hyperthyroidism, the TSH and T4 may be normal. In that case, the T3 level is helpful in identifying hyperthyroidism and determining the severity of hyperthyroidism.
What type of specimen will I submit?
This Thyroid Panel - High (Hyperthyroid) is a blood test.
Do I need to fast to take this test?
Fasting is not necessary.
How long does it take to get test results?
It typically takes 4 business days or less.