This site is intended for healthcare professionals

Go to /sign-in page

You can view 5 more pages without signing in

Basic thyroid function tests

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

The first-line thyroid investigation in many hospitals is the highly sensitive TSH assay which should have a limit of detection of <0.1 mU/L.

The addition of an assay for free or total thyroid hormone concentration will reduce diagnostic error but at an increased cost.

Note that reference ranges may vary between laboratories.

Related pages

Create an account to add page annotations

Annotations allow you to add information to this page that would be handy to have on hand during a consultation. E.g. a website or number. This information will always show when you visit this page.