A member asked:

What is high tsh, 3rd generation?

A doctor has provided 1 answer
Dr. David Geffner answered

Specializes in Endocrinology

Same as others: The 3d generation TSH assays are best at the lowest ranges - the upper range is debatable as tsh, unlike most products in the blood is not distributed in populations in a bell curve. The upper limits of the "normal" range of 4 to 5 in assays of all generations is probably wrong.

Answered 10/23/2017

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