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Common Mayo Medical Laboratories Test-Ordering Errors
Part 4: Overordered Tests

JAK2 on Blood and Bone Marrow
Free Thyroxine index (FTI) and T3 Uptake



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Outdated Thyroid Function Tests

Slide 6

July 2010

Next, I’d like to discuss 2 endocrine tests,  free thyroxine index (FTI) and  T3 uptake, which are 2 outdated tests that should no longer be ordered because we have better tests available. First, I’ll make a few general remarks about thyroid hormones to explain why the free thyroxine index was developed many years ago.

Outdated Thyroid Function Tests

 


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