A thyroid panel is used to evaluate thyroid function and/or help diagnose hypothyroidism and hyperthyroidism due to various thyroid disorders. The panel typically includes tests for:
A thyroid panel may be ordered when symptoms suggest hypo- or hyperthyroidism due to a condition affecting the thyroid. They may also be requested following commencement of treatment for any detected thyroid condition.
The following table summarizes some examples of typical test results and their potential meaning.
TSH | T4 | T3 | INTERPRETATION |
High | Normal | Normal | Mild (subclinical) hypothyroidism |
High | Low | Low or normal | Hypothyroidism |
Low | Normal | Normal | Mild (subclinical) hyperthyroidism |
Low | High or normal | High or normal | Hyperthyroidism |
*Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
None needed; however, certain medications can interfere with the tests included in the panel, so tell your health practitioner about any drugs that you are taking. If you take thyroid hormone as treatment for thyroid disease, it is recommended that your blood sample be drawn before you take your dose for that day.
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