Thyroxine Free T4 Low. If your results appear as high total t4 or a high free t4 index, it indicates you might be experiencing from hyperthyroidism. Doctors may refer to this as “free” t4 (ft4).
If your t4 test results are not normal, your health care provider will likely order more thyroid tests to help make a diagnosis. If your results show a low total t4 or a low free t4 index, it indicates a. The finding of an elevated tsh and low ft4 or fti indicates primary hypothyroidism due to disease in the thyroid gland.
As a thyroid cancer patient your docs will want to suppress your tsh production because by.
Free and total thyroxine (ft4 and t4) low total thyroxine (t4) is low when it falls below 4.5 μg / dl (or the 58 nmol / l according to the si unit of measurement, the international system of units) free or free thyroxine (ft4) is low when it falls below 0.8 ng / dl (or 10 pmol / l according to the si unit of measurement, the international system of units) A low tsh with an elevated ft4 or fti is found in individuals who have hyperthyroidism. If your test results show raised tsh but normal t4, you may be at risk of developing an underactive thyroid in the future. Doctors may refer to this as “free” t4 (ft4).
