The free triiodothyronine (FT3) test, which is most commonly referred to as a T3 test, measures the level of a hormone called triiodothyronine in your blood. T3 is a hormone secreted by the thyroid glands and is very important for the metabolism of your body, including your heart rate and temperature. A T3 test is required in cases of symptoms like anxiety, weight loss, low tolerance for heat, and trouble sleeping. This test is often used to diagnose hyperthyroidism, a condition in which the body makes too many thyroid hormones.
It is recommended:To diagnose thyroid diseases (hypothyroidism or hyperthyroidism).To check the thyroid status in patients with altered distribution of thyroid binding proteins (e.g., pregnancy, dysalbuminemic).To find the patient’s response to the treatment of the diseases.
The free T3 (FT3) test measures:The FT3 test checks the active form of T3 that is not bound to the protein. The total T3 test measures both bound T3 and free T3 combined.T3 in the body is bound to proteins as it circulates in the bloodstream. The small proportion, known as free T3, is not attached to the proteins.Free T3 testing may be used to determine whether thyroid replacement therapy is effective or not. It can also help in diagnosing the abnormalities of the proteins that bind thyroid hormones.
You will get the reports within 6 hours after the collection of the blood sample.
The cost of the free T3 (FT3) test is Rs. 380.
The free T3 (FT3) test is prescribed by your doctor after a complete assessment of your symptoms and conditions.
2.77–5.27 pg/ml
We require a blood sample for this test.
This test can be taken at any time during the day.
No, fasting is not required for this test.
There are no specific precautions for this test.
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