New endo checks Free Total and Index..........yep

[LazyMoose]

Against my grain this new one says Free total T3,T4 and T3, T4 Index are more accurate than Free T3 and Free T4. I even mentioned all Ive read about frees being more accurate. Yea , I know, they're obsolete.

We'll see what his conclusion of the results are, I plan to ask him just why he thinks its better. I want him to prove it.

Who has a good article (Md based) on free T3 levels written in a respected medical journal??

[LazyMoose]

The above was from http://www.pathologyoutlines.com/chemistry.html

he's old school

[LazyMoose]

T3 or T4 uptake

top

Also called T3 or T4 resin uptake or Thyroid Hormone Binding Ratio (THBR)

Measures proteins, not thyroid hormones

Relative measurement of unoccupied thyroid hormone binding sites on circulating proteins, including thyroid binding globulin (TBG)

Should be reported as a ratio to normal serum

***Indications: previously used to calculate free thyroxine index (total T4 x T3 uptake), an estimate of free T4 (now free T4 is ordered directly); attempts to correct for changes in thyroid binding globulin due to liver disease, protein losing states, pregnancy or various drugs***

- guess this is what hes doing. I will find out in 1 1/2 weeks

[stella5349]

http://www.pathologyoutlines.com/chemistry.html

[stella5349]

http://www.drkaslow.com/html/thyroid.html

[stella5349]

http://www.suite101.com/content/new-thyroid-disease-a56229

[Barb135]

If you only have total, you don't know how much is bound to proteins and therefore, unusable.......... but then you know that!!

I've had articles/research on FT3; however, it would take me a while to find them.  I would guess that gimel has them handy and would be an excellent source for you.  

Will be interested in seeing how well this doctor helps you.

[stella5349]

http://circ.ahajournals.org/cgi/content/full/107/5/708

[LazyMoose]

I meant total T3,T4, not free total T3 T4........