The Thyroid Stimulating Immunoglobulin (TSI) test is a blood test that measures the level of thyroid stimulating immunoglobulins in the blood. These antibodies can stimulate the thyroid gland to produce excessive amounts of thyroid hormone, leading to a condition known as Graves' disease.
TSI levels are typically elevated in individuals with Graves' disease, and the test can help diagnose and monitor the condition. It may also be used to differentiate between Graves' disease and other thyroid disorders.
A healthcare provider may order a TSI test if a person is experiencing symptoms of hyperthyroidism, such as rapid heart rate, weight loss, tremors, and anxiety. The test may also be used to monitor the effectiveness of treatment for Graves' disease.
The results of the TSI test are usually reported as a numerical value, with higher levels indicating a greater likelihood of Graves' disease.
USLABTESTING