What's Tsh 3Rd Generation?

Third-generation thyroid-stimulating hormone (TSH) assays are generally the most sensitive screening tool for primary hypothyroidism. If TSH levels are above the reference range, the next step is to measure free thyroxine (T4) or the free thyroxine index (FTI), which serves as a surrogate of the free hormone level.

What is the normal range for TSH 3rd generation?

4 Spectra has validated a TSH reference range of 0.300-3.000 mIU/L, which is also the range recommended by the American Association of Clinical Endocrinologists (AACE).

What if TSH 3rd generation is high?

If your TSH levels are abnormally high, it could mean you have an underactive thyroid, or hypothyroidism. That's because it indicates your pituitary gland is producing more TSH in an effort to stimulate your thyroid to produce thyroid hormone, according to the Mayo Clinic.