Thyroid Function Test
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Contents |
More Specific Terms
- anti-thyroglobulin antibody
- anti-thyroid peroxidase (microsomal) antibody
- free thyroxine index (fT4I)
- pentagastrin stimulation test (calcitonin-stimulation test)
- radioactive iodine uptake (RAIU) test
- T3 resin uptake
- thyroglobulin in serum
- thyroid-stimulating hormone (TSH) in serum
- thyroxine [T4] (free) in serum
- thyroxine [T4] (total) in serum
- TRH stimulation test
- triiodothyronine [T3] (free) in serum
Introduction
- A collective term used for laboratory tests to check the function of the thyroid.
Indications
- assessment of hypothyroidism
- assessment of hyperthyroidism
- monitoring thyroid replacement therapy
Drug-interactions
- inhibition of TSH synthesis or release
- decreased thyroid hormone synthesis or release
- amiodarone
- corticosteroids
- ipodate, iopanoic acid
- propranolol (high dose)
- propylthiouracil
- decreased thyroxine-binding globulin
- increased thyroxine-binding globulin
- displacement of T4 from binding proteins
- drugs inhibiting absorption of enterohepatic circulation of thryoxine ( T4)
- drugs causing thyroiditis
Principle
- non-thyroid illness is commonly associated with changes in thyroid function test; no treatment necessary
- see specific thyroid disease
More General Terms
Additional Terms
References
- Medical Knowledge Self Assessment Program (MKSAP) 15, American College of Physicians, Philadelphia 2009
- Wikipedia: Thyroid function tests [1]
