Free Thyroxine Index Vs Free T4. When pituitary or hypothalamic disease is at fault, the tsh may be low or normal. Normal ranges for free t4:
The Thyroid Gland Basicmedical Key from basicmedicalkey.com
Results are independent of binding protein concentrations. The correlations of the total t3, free t3, and free t3 index with, respectively, the total t4, free t4, and free t4 index were much lower, though still statistically significant. There is a higher volume of bound t4 than free t4 in the body.
1 distribution of free thyroxine values in seven groups ofsubjects.
Elevations in ft4 cause hyperthyroidism, while decreases cause hypothyroidism. Thyroxine (t4) occupies the free binding sites in the serum sample. The normal range for the free t index is 1.1 to 4.3 mcg/dl. However, this test is more costly and.
