Together, these hormones regulate body temperature, heart rate, and metabolism.
They also promote growth, development, and maturation of the brain and nervous system.
Antibodies serve a purpose in your body; they defend against bacteria, viruses, and toxins.
Illustration by Michela Buttignol for Verywell Health
In an individual with a healthy functioningimmune system, the body views TPO as an essential, hormone-making enzyme.
Purpose
The TPO antibody test is done to help diagnose Hashimotos thyroiditis.
If youve had a previous blood sample taken from your arm, this test will be similar.
Veins differ from person to person.
This may cause slight pain.
The discomfort should disappear in a day or two.
Sometimes, people may feel faint or lightheaded with blood tests.
You may also have the option of taking the test in a lying position.
These may include thyroid replacement drugs, steroids, certain heart medications, and others.
Your healthcare provider will provide you with specific instructions for taking this blood test.
On the day of the test, youll be able to wear your normal clothes.
After that, they will disinfect the area with an alcohol swab or pad.
Usually, this throw in of blood test only takes a few minutes.
After the Test
Unless otherwise advised, you should be to go back to your normal activities.
Generally, youll have the results of the tests in a couple of days.
If the test is negative, it is less likely that you have Hashimoto’s disease.
On its own, a TPO antibody test has limited diagnostic value.
To put yourself at ease, verify you have a healthcare provider whom you trust.
Frequently Asked Questions
Thyroid peroxidase (TPO) antibodies are tested to help diagnose Hashimoto’s disease.
This is an autoimmune disease that attacks the thyroid gland and affects its function, leading to hypothyroidism.
This leads to low levels of thyroid hormones and hypothyroidism.
TPO antibody tests are performed in a doctor’s office or laboratory and requrie a blood sample.
The healthcare provider will place an elastic band around one arm to restrict blood flow and locate a vein.
After disinfecting the area using an alcohol swab, they use a needle to draw blood from the arm.
NIH National Institute of Diabetes and Digestive and Kidney Diseases.Hashimoto’s Disease.
