Thyroid function tests (TFTs) is a
collective term for blood tests used to check the function of the
thyroid.
TFTs
may be requested if a patient is thought to suffer from hyperthyroidism (overactive
thyroid) or hypothyroidism (underactive thyroid), or to monitor the
effectiveness of either thyroid-suppression or hormone replacement therapy. It
is also requested routinely in conditions linked to thyroid disease, such as atrial
fibrillation and anxiety disorder.
A
TFT panel
typically includes thyroid hormones such as thyroid-stimulating
hormone (TSH, thyrotropin) and thyroxine (T4), and triiodothyronine(T3)
depending on local laboratory policy.
THYROID FUNCTION TEST
FT3
FT4
TSH