Jan 25 (Reuters) – The iodide dye used in heart scans and other medical imaging, such as CT scans, may in some cases damage patients’ thyroid glands, possibly leading to health problems such as thyroid disease later on, according to a U.S. study.
Can contrast dye affect your thyroid?
Even though both low- and high-thyroid conditions are possible after IV contrast dye, the likelihood is small. Published rates of developing high thyroid levels (hyperthyroidism) after IV contrast range from 0 to 6 percent of people within two years. The high thyroid levels usually were temporary.
Can radiation affect the thyroid?
Many patients who have radiation therapy for head and neck cancer receive radiation to the area of the thyroid gland, an important organ located in the midline lower neck. Damage to the thyroid gland from radiation therapy can result in hypothyroidism.
What can mess up your thyroid?
The thyroid gland is a shield-shaped gland located in your neck. It secretes the hormones T3 and T4 that control the metabolism of every cell in the body. Foods that are bad for the thyroid gland include foods from the cabbage family, soy, fried foods, wheat, foods high in caffeine, sugar, fluoride and iodine.
What are the side effects of contrast dye after a CT scan?
Mild reactions include:
- nausea and vomiting.
- mild skin rash or hives.
Can iodine contrast cause thyroid problems?
Administration of iodinated contrast results in a large iodine load to the thyroid (at least 90 times the daily recommended intake), which may lead to increased secretion of thyroid hormones (see: Jod-Basedow phenomenon).
Can MRI with contrast cause hyperthyroidism?
Thyroid trouble Previous studies found that a relationship exists between ICM and kidney damage, but none had examined in depth the relationship between ICM and thyroid disorders.
Can iodine from CT scan affect thyroid?
With the increase in the use of computed tomography scans in the United States, there is increasing risk of contrast-induced thyroid dysfunction. Patients at risk of developing iodine-induced thyroid dysfunction should be closely monitored after receiving iodinated contrast media and should be treated as needed.
Can radiation cause hyperthyroid?
High-dose irradiation has been reported to induce a variety of thyroid diseases, including thyroid dysfunction (hypothyroidism and hyperthyroidism) and thyroid neoplasia. It is easy to understand that high-dose irradiation (either internal or external) destroys the thyroid gland, leading to destructive hypothyroidism.
Can hypothyroidism be caused by radiation?
Radiation-induced hypothyroidism (RIHT) is a well-known late effect of radiation to the thyroid gland, which can develop months to years after RT. The reported incidence of RIHT varies considerably, however, and the tolerance level of the thyroid gland is poorly defined.
What are early warning signs of thyroid problems?
Early signs of thyroid problems include:
- Gastrointestinal problems.
- Mood changes.
- Weight changes.
- Skin problems.
- Sensitivity to temperature changes.
- Vision changes (occurs more often with hyperthyroidism)
- Hair thinning or hair loss (hyperthyroidism)
- Memory problems (both hyperthyroidism and hypothyroidism)
What are signs that your thyroid is not working?
Symptoms. A person with mild hypothyroidism might feel fine and have no symptoms. But those with symptoms can experience a puffy face, sluggishness, weight gain, feeling cold, a slowed heart rate, constipation, depression, and thinning hair.
Do you have hypothyroidism look at your hands?
Signs and symptoms of hypothyroidism can show up in the hands and nails. Hypothyroidism can cause dermatologic findings such as nail infection, vertical white ridges on the nails, nail splitting, brittle nails, slow nail growth, and nails lifting up.
Can CT scan cause side effects?
Most of the time, the reaction is mild. It can lead to itchiness or a rash. In very few cases, the dye may trigger a life-threatening reaction. For this reason, your health care provider may want to monitor you for a short period after your CT scan.
How long does CT scan dye stay in your system?
With normal kidney function, most of the gadolinium is removed from your body in the urine within 24 hours. If you have acute renal failure or severe chronic kidney disease and receive a gadolinium-based contrast agent, there may be a very small risk of developing a rare condition.
Are there any after effects from a CT scan?
You shouldn’t experience any after-effects from a CT scan and can usually go home soon afterwards. You can eat and drink, go to work and drive as normal. If a contrast was used, you may be advised to wait in the hospital for up to an hour to make sure you don’t have a reaction to it.