Eun Lee, MD If your healthcare provider has ordered a T4 test, you may wonder what it is. Thyroxine is another name for T4, ...

A high serum T3 is often seen in thyroid hormone resistance syndromes ... Alternatively, in the case of highly bound hormones, such as thyroxine, the Law of Mass Action can be used to calculate ...

Thyroxine requirements decline with age ... (Serum FT4 is increased (~13 %) above baseline for 9 hours after ingesting L-T4). Serum TSH measurement is the most diagnostically sensitive test ...

14 Individual preparations of desiccated thyroid were given to patients ... with postoperative hypothyroidism.* Serum was sent for analysis of thyroxine-binding because the butanol extractable ...