T3RU test

T3RU Test: What is it?

T3RU, or the Thyroid Stimulating Hormone Receptor Immunoassay, is a blood test used to determine the amount of thyroid-stimulating hormones in the body. When the levels are too high, it could signal a thyroid disorder. The T3RU test can help diagnose hyperthyroidism and hypothyroidism, uncover the cause of other thyroid disorders, or help to monitor progress during treatment.

T3RU Test Preparation

No preparation is typically needed before a T3RU test. You will be given instructions on when to fast or take specific medications before the test. Instructions should be followed by the letter. Following the laboratory's instructions will provide accurate results and prevent the need to repeat the test.

T3RU Test Procedure

The test is a simple blood test that can be done in a doctor’s office, clinic or hospital outpatient department. To draw blood, a technician will insert an intravenous needle into a vein and draw out a sample, which is sent to a lab for analysis.

Types of T3RU Tests

There are two types of T3RU tests that may be requested by doctors: the TRH stimulation test and the TSH 3rd generation test. The TRH stimulation test uses the hormone thyrotropin to stimulate the production of thyroid hormones in the body and measure the amount of the hormones produced. The TSH 3rd generation test is done to measure the amount of the hormone thyrotropin in the blood. Both tests provide insight into the body's thyroid function.

T3RU Test Risks

The T3RU test is a safe procedure with few risks. Typical risks associated with a blood draw can include faintness or dizziness, bruising or slight bleeding. Also, some people experience lightheadedness after the needle is removed.

Why is the T3RU Test Performed?

The T3RU test is done to detect and diagnose thyroid problems. It is done along with other diagnostic tests to determine the cause of an under or overactive thyroid. Additionally, the test can help monitor progress of the thyroid treatment and measure the effectiveness.

When is the T3RU Test Performed?

Doctors may order the T3RU test when a person shows symptoms of an underactive or overactive thyroid, such as weight loss or weight gain, feelings of depression or anxiety, decreased energy or fatigue, and changes in menstrual cycles. Additionally, the test can be done when a person has an enlarged thyroid or family history of thyroid problems.