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
Interpreting Thyroid Tes...
...able 1. Key Clinical Points for Interpreting Thyro...
...adays, most thyroid tests are made on...
Clinical Thyrotropin Measurements
...linical Thyrotropin Measurement...
...to Consider for Clinical Thyrotropin Measur...
...matic Presentation of Dynamic Changes...
...e 3. Common Physiological and Pharmac...
...e 4. Rarer Causes of Perturbation of the H...
...5. Clinical Utility of Triiodothyronine...
...Causes of Artifactual Results in...
.... Status of Comparability of Results...