Thyrotropin (TSH) is a pituitary hormone that regulates thyroid gland function. Thyroxine (T4-V) is a thyroid hormone. Thyroid function tests are performed if there is a suspicion of an underactive or overactive thyroid.

Thyroid tests are performed on a blood sample. The test does not require fasting. Samples are collected between 7:00–16:00. If you are on thyroid medication, do not take the medicine before sampling on the sampling day. You should always take the follow-up tests around the same time of the day to ensure that the results are comparable.

Read more: Thyroid tests

Reference values: Thyroid tests

Abbreviation: (P -TSH ja P -T4-V)

Examination code: 4831, 4832