Several methods can be used and combined to diagnose hypothyroidism. Among others are:
- Blood tests to measure levels of T4 and TSH in the blood. A very low level of T4 in the blood may indicate a condition of hypothyroidism in a person. In some cases, T4 levels in a person’s blood are still in normal numbers, but there is an increase in TSH. The condition is called mild hypothyroidism or subclinical hypothyroidism. Normal TSH is 0.4-4.2 mIU / L. Whereas in patients with subclinical hypothyroidism, the rate of TSH in the blood usually ranges between 4.5-10.0 mIU / L.
- Routine thyroid examination (screening). Thyroid examination is highly recommended for people at risk of hypothyroidism. Thyroid examination in newborns is useful so that hypothyroidism is known from the beginning and prevents baby growth delay. Some people who are also recommended to undergo routine thyroid examination are:-Pregnant women.-Woman over 60 years old.-Patients with type 1 diabetes.-People with autoimmune disease.-Receive radiation to the neck region.
- Thin needle biopsy. A thin needle biopsy to check the thyroid gland can help diagnose hypothyroidism. The target for the implementation of a thyroid biopsy is to determine the presence of nodules in the thyroid that are the clinical signs of hypothyroidism, eutyroidism, and hyperthyroidism. Nodules in the thyroid are often found on examination using CT scan, MRI, and chest X-rays. Biopsy can be assisted using ultrasound.