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Old 12-06-2001, 10:55 AM   #1
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Low T Uptake...what does that mean??

HI Everyone...Just a quick question....I received my annual physical bloodwork results in the mail recently. I noticed I had a low "T Uptake" but doctor has not mentioned anything to me. My other thyroid tests were in the normal range. What does that mean? the normal range began at 26 and my number was 24.

Any info would be greatly appreciated.

Thanks, Beth

 
Old 12-06-2001, 11:58 AM   #2
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Re: Low T Uptake...what does that mean??

Hi Beth. I found a lab website (commercial) that defined it as follows:

<B>T-uptake:</B>
A measurement of the total binding capacity of the thyroxine binding proteins for thyroid hormones.

This test is used in combination with other thyroid tests to calculate the "total" factors:


<B>Thyroid Uptake (T-uptake)</B>

These assays have been variously referred to as T3-uptake, T4-uptake and thyroid-uptake tests, depending on the assay design. All are used in exactly the same manner and for the same purpose, not as stand-alone assays, but in combination with total T4 (or sometimes total T3) assays. Matched T-uptake and total T4 results are used to calculate a free thyroxine index (FT4I). The FT4I serves as an indirect estimate of free T4 levels, and was heavily relied upon historically, particularly before direct free T4 assays became available.

How was your Free T4? That's one of the better indicators (besides your symptoms).

 
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Old 12-06-2001, 01:27 PM   #3
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Re: Low T Uptake...what does that mean??

I will have to check my results for my T4 level when I get home. I dont remember, but I do know it was within the normal range. I suppose I can just call my doc. and ask if it is anything I should be concerned about! Thanks for giving me that info... I appreciate it!

 
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