Free Triiodothyronine
Laboratory Tests
estimated about CNY 50-200
(estimated about USD 10-30)
1 day
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Description
Free Triiodothyronine (FT3) testing measures active thyroid hormone levels to diagnose or monitor thyroid disorders like hyperthyroidism; costs ¥10–30 at partner hospitals in China, with ChinaMedicalHub assisting with booking and interpreter support.
Main Uses
Diagnosing and monitoring thyroid disorders such as hyperthyroidism and hypothyroidism, assessing thyroid function in patients with suspected or known thyroid diseases, evaluating the effectiveness of thyroid hormone replacement therapy, and differentiating between primary, secondary, and tertiary causes of thyroid dysfunction
Normal Range
The normal range for Free Triiodothyronine (FT3) is typically between 2.3 to 4.2 pg/mL, though this can vary slightly depending on the laboratory and the specific testing method used.
Low Values - Possible Causes
Hypothyroidism, iodine deficiency, pituitary gland dysfunction, certain medications (e.g., lithium, amiodarone), non-thyroidal illness syndrome
High Values - Possible Causes
Hyperthyroidism, Graves' disease, toxic multinodular goiter, thyroiditis, excessive intake of thyroid hormone medication