What are normal thyroid levels Australia?
What are normal thyroid levels Australia?
0.4–2.5 mIU/L) is reasonable. A TSH level in the upper half of the reference range is usually acceptable in older persons. Lower TSH targets may be adopted in pregnancy, and in patients with thyroid cancer, and specialist advice should be sought in these cases (Table 3).
What is the reference range for thyroid?
Normal test range for an adult: 0.40 – 4.50 mIU/mL (milli-international units per liter of blood). T4: thyroxine tests for hypothyroidism and hyperthyroidism, and used to monitor treatment of thyroid disorders. Low T4 is seen with hypothyroidism, whereas high T4 levels may indicate hyperthyroidism.
What is a normal TSH level on levothyroxine?
In most patients on thyroxine replacement, the goal TSH level is between 0.5 to 2.5 mU/L. Patients who have had thyroid cancer are usually on higher doses of thyroxine and their target TSH level is lower than normal.
Is my thyroid pathology result in the normal reference range?
It is not the fact that your Thyroid pathology result sits in the normal reference range, but where your result sits in the normal range! Please Note: Reference ranges for children and pregnant women may vary from the normal adult reference range. Laboratory reference ranges can also vary.
What is the normal upper limit of TSH reference range?
There is considerable debate about the normal upper limit of the TSH reference range. The high background prevalence of autoimmune thyroid disease as well as the age, iodine status, smoking prevalence and ethnicity of the ‘normal’ population has raised the ‘normal’ upper limit. In people without these factors the upper limit is probably 2.5 mIU/L.
Is free T3 a real-time measure of thyroid function?
They argue that TSH is an inexact value given that it can lie within the normal range with Hashimoto’s disease and that free T3 offers a “real-time” snapshot of thyroid function. For these practitioners, a low free T3 is considered justification for thyroid hormone replacement therapy.
What are the American Thyroid Association guidelines on thyroid screening?
The American Thyroid Association guidelines do not support universal screening, but recommend ordering TSH at the first antenatal visit for women with high risk attributes for thyroid dysfunction (Table 2), with a reflex free T4 if TSH is abnormal. 13 If TSH is elevated the author advocates TPOab testing.
