![]() |
NAME | METHOD | REFERENCE RANGE | UNITS |
![]() |
T Uptake | ICMA | 25 - 35 | % |
![]() |
Thyroxine (T4) | ICMA | view ref range | ug/dL |
![]() |
Free Thyroxine Index | CALC | 1.1 - 4.2 |
![]() |
TYPE | VOLUME | TEMPERATURE | INSTRUCTIONS |
PRIMARY | ||||
1 | Serum | 2 (1) mL | Refrigerated - 4 Day(s), Frozen - 2 Month(s) |
Thyroid function tests to diagnose hypothyroidism or hyperthyroidism. TSH and free T4 are recommended for assessment of thyroid function. Indirect index methods employ two separate tests to estimate the free hormone concentration: total serum T4 (or T3) measurement and an assessment of either TBG or the free hormone fraction. Results of these tests are then combined mathematically to give estimates of the free hormone concentration. |