How is factitious thyrotoxicosis diagnosed?
Factitious hyperthyroidism is higher-than-normal thyroid hormone levels in the blood and symptoms that suggest hyperthyroidism. It occurs from taking too much thyroid hormone medicine….Blood tests used to diagnose factitious hyperthyroidism include:
- Free T4.
- Thyroglobulin.
- Total T3.
- Total T4.
- TSH.
What does a radioactive iodine uptake test for?
A radioactive iodine uptake (RAIU) test uses a radioactive tracer and a special probe to measure how much tracer the thyroid gland absorbs from the blood. The test can show how much tracer is absorbed by the thyroid gland.
What laboratory testing should be performed to confirm thyrotoxicosis?
Blood tests that measure thyroxine and thyroid-stimulating hormone (TSH) can confirm the diagnosis. High levels of thyroxine and low or nonexistent amounts of TSH indicate an overactive thyroid. The amount of TSH is important because it’s the hormone that signals your thyroid gland to produce more thyroxine.
What is the normal 24 hour radioactive iodine uptake?
The normal values of thyroid uptake of radiotracer are 3 to 16% at 6 hours and 8 to 25% at 24 hours. These values may change according to laboratory standard techniques or patient dietary habits. The thyroid gland can uptake more or less than normal.
What is iodine induced thyrotoxicosis?
Iodide-induced thyrotoxicosis appears to result from loss of the normal adaptation of the thyroid to iodide excess. It is treated with cessation of the excess iodine intake and with administration of antithyroid medication. Usually, after depletion of the excess iodine, thyroid functions return to preexposure levels.
Is Radioactive iodine uptake test safe?
The risk is minimal. The amount of radioactivity is very small and there have been no documented side effects. However, as with any radiation exposure, this test is not recommended for women who are pregnant or breastfeeding. The amount of iodine used is less than a normal dietary iodine intake.
What is thyrotoxicosis disease?
Thyrotoxicosis is a condition in which you have too much thyroid hormone in your body. Your thyroid — the butterfly-shaped gland in the front of your neck — makes and releases two hormones: triiodothyronine (also called T3) and thyroxine (also called T4).