Thyroid Hormones
Publication Date: August 31, 2023
Key Points
Key Points
- The “quality” of thyroid testing is defined by its ability to discriminate among hyperthyroid, hypothyroid and euthyroid, including subclinical conditions.
- Over the past 65 years, a progressive improvement in methods to quantitate clinically relevant thyrotropin (TSH), thyroxine (T4), and triiodothyronine (T3) concentrations has led to this state-of-the-art status report on current recommendations.
- Because of the log-linear relationship of TSH to free T4 (fT4), deviations of TSH concentration from population-specific reference intervals represent the preferred initial test for evaluation of thyroid function.
Interpreting Thyroid Tests
...reting Thyroid Tests...
...y Clinical Points for Interpreting Thyroid...
...days, most thyroid tests are made on...
Clinical Thyrotropin Measurements
...al Thyrotropin Measurement...
...to Consider for Clinical Thyrotropin Meas...
...atic Presentation of Dynamic Changes of...
...n Physiological and Pharmacological Effects on...
...le 4. Rarer Causes of Perturbation of the Hypotha...
...ble 5. Clinical Utility of Triiodothyronin...
Table 6. Causes of Artifactual Res...
...e 2. Status of Comparability of Results for...