T3 Reverse Test

T3 Reverse test is an automated blood test to measure the level of T3 Reverse in blood. It is performed to confirm whether Hyperthyroidism and Hypothyroidism are present. This test is also helpful during and after the treatment of Hyperthyroidism and Hypothyroidism. Also commonly known as Reverse Triiodithyroinine Blood or Reverse Triiodithyroinine. Generally, increased levels of T3-R have been found in the cases of starvation, anorexia- nervosa, severe trauma and hemorrhagic or shock, hepatic dysfunction, postoperative states, severe infection, and in burn patients.

Make sure to wear a short-sleeved shirt or a shirt with sleeves that you can easily roll up.No special preparation needed for the T - 3 reverse blood test. There’s no need to adjust your diet. You can both eat and drink normally.However, your doctor may require that you fast for a specific amount of time before the test. That’s common if the blood sample is required for additional testing. Your doctor will give you specific instructions.

The normal result obtained for T3 Reverse is T3 Reverse found between 10 - 24 ng/dL for unisex gender and for all the age groups. The T3 Reverse is seen high in patients on the following medications: propylthiouracil, ipodate, propranolol, amiodarone, dexamethasone, and the anesthetic agent halothane. Dilantin decreases T3 Reverse due to the displacement from thyroxine-binding globulin, which leads to an increase in T3 Reverse clearance. In hospitalized or sick patients with low triiodothyronine (T3) values, increased reverse triiodothyronine (rT3) values are seen normally with "sick euthyroid" syndrome.

During this test, a lab technician will draw blood from a vein, generally
from the inside of your elbow.
The lab assistant will:
1.clean your skin with an antiseptic wipe.
2.place an elastic band around your upper arm to help the vein swell
with blood.
3.insert a needle in the your and collects the required amount of blood.
4.cover the area with a bandage to stop any bleeding.
5.label your sample and send it to a lab for analysis.
Reverse triiodothyronine-13C ( rT3-13C ) is added to your serum or
plasma samples as an internal standard to check for T3-R.