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Thyroid hormone tests are blood tests that check to see how well your child's thyroid gland is working. The thyroid gland is a butterfly-shaped gland that lies in front of your child's windpipe (trachea). It's just below the voice box (larynx). The thyroid gland makes hormones that control the way your child's body uses energy (metabolism).
These tests show your child's thyroid hormone levels. Your child's thyroid may be making too much or too little hormone.
Thyroid hormone tests are done to find the cause of an abnormal thyroid-stimulating hormone (TSH) test. TSH tests can also check how well treatment for thyroid disease is working. They are used in newborns to find out if the thyroid gland is working as it should.
If your child takes thyroid medicines, tell the doctor when your child took the last dose. Your child may need to stop taking thyroid medicines for a short time before having these tests. Extreme stress and illness can also affect thyroid test results.
A health professional uses a needle to take a blood sample, usually from the arm.
A heel stick is used to get a blood sample from a baby. The baby's heel is poked, and several drops of blood are collected. Your baby may have a tiny bruise where the heel was poked.
Follow-up care is a key part of your child's treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse call line if your child is having problems. Ask your doctor when you can expect to have your child's test results.
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Adaptation Date: 11/17/2021
Adapted By: Alberta Health Services
Adaptation Reviewed By: Alberta Health Services
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