What does this panel test for?
This panel tests your Free & Total T3, Free & Total T4, Thyroid Peroxidase Antibodies (TPO), and TSH blood levels.
Why is this panel important?
This panel helps check for both hyperthyroidism and hypothyroidism. An intermediate or high TSH generally suggests hypothyroidism. A low T4 will confirm the diagnosis. The TPO Antibody test helps to determine if the hypothyroidism is caused by an autoimmune disease such as Graves' or Hashimoto's. A low TSH and a high T4 are also usually seen in hyperthyroidism. The T3 is measured to determine the severity of hyperthyroidism.
What type of specimen will I submit?
This Thyroid Panel - High & Low 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.