Thyroid Stimulating Hormone (TSH) Ultrasensitive, Serum
Synonyms/Also Known as
Free T4, Free T3 and Total T3, Thyroid Panel, Thyroid Antibodies
Why get tested?
To screen for thyroid disorders and to monitor treatment of hypothyroidism and hyperthyroidism.
When to get tested?
For newborn screening, to evaluate the thyroid gland functional status, when suspecting hyper or hypothyroidism, to monitor the effectiveness of treatment.
Test preparation needed
No special preparation required
About The Test
How is it used
1. What are the conditions associated with hypo- and hyperthyroidism?
The most common causes of autoimmune-related thyroid disorders are like graves disease which causes hyperthyroidism and Hashimoto thyroiditis which causes hypothyroidism. Thyroiditis, thyroid cancer, and excessive or deficient production of TSH can cause both hyper and hypothyroidism.
2. What is goiter?
Goiter is abnormal enlargement of the thyroid gland and may be associated with hypo, hyper or euthyroidism.
3. What are the additional blood tests that may be performed?
Thyroid panel (T3, T4 and TSH) - to help diagnose and differentiate various thyroid disorders.
Thyroid auto - antibodies which help in differentiating different types of thyroiditis and identifying autoimmune thyroid conditions.
Calcitonin - Increased levels of calcitonin are seen in C-cell hyperplasia and medullary thyroid cancer.
Thyroglobulin - to monitor treatment of thyroid cancer.
4. How can I tell if my thyroid is working properly?
Both an underactive and overactive thyroid gland can cause symptoms. An enlarged thyroid gland either dissure or nodule, hoarseness of voice and symptoms like fatigue, depression, anxiety, weight loss or weight gain, temperature intolerances, hair loss, dryness of skin, or menstrual irregularities indicate a thyroid disorder.
5. Is uTSH measured during pregnancy?
uTSH is generally not measured in asymptomatic pregnant women. But uTSH is measured in those with symptoms and/or a known thyroid disorder at regular intervals to detect and evaluate functional status of thyroid (hyperthyroidism or hypothyroidism) both during pregnancy and after.