Labs - questions

[Guest guest]

I just got my latest labs - the FT4, FT3, and TSI that I had to fight for.

The results are below, followed by most of my labs from most recent to

oldest (when I was diagnosed 15 mos. ago).

In general, my T4 and FT4 have both tested in the low-normal range once my

hyperT was controlled, but my T3 and FT3 have been more mid-range or even

high-normal - no apparent relationship to how I feel. Why would that be? I'm

tempted in the future to only go for the FT4, not the FT3.

What is the significance of the moderately elevated TSI? It is well out of

the normal range, and over half of what it was at when I was quite hyper -

but I definitely feel hypo now and have for months.

I hadn't noticed before - the Thyroid peroxidase AB test on 10/17 - the

results came back as " >70.0 " (0.0-2.0). Doesn't that mean it could be much

higher? My orginal testing for this returned a value of 617. If this is

still higher than reflected here, could that account for my feeling hypo?

I plan to start on .025mg of Synthroid tomorrow morning. Does it really take

weeks to notice a difference when starting hormone replacement?

Thanks for any help,

Jill

10/29/03 (felt hypo!)

FT4 0.9 (0.8-1.8)

T4 6.0 (4.5-12.0)

FT3 307 (230-420)

TSH 1.74 (0.40-5.50)

TSI 188 (<125) - compared to my peak hyperT state, 8/02: 314

10/17/03 (felt hypo!)

T4 6.7 (4.5-12)

T3 126 (60-181)

TSH 2.14 (0.40-5.50)

Thyroid peroxidase AB >70.0 (0.0-2.0)

Thyroglobulin AB 16.7 (<2.0)

7/30/03 (felt hypo!)

FT4 0.9 (0.8-1.8)

T3 164 (70-170)

TSH 2.85 (0.40-5.50)

(Felt my thyroid levels plummeting; went from 125mg of PTU to 100mg to 0mg

in very short order.)

6/5/03 (felt middling to OK, but trending hypo; recent recovery from

pneumonia)

FT4 1.0 (0.8-1.8)

T3 116 (70-170)

TSH 1.77 (0.40-5.50)

12/23/02 (felt hypo)

FT4 0.9 (0.8-1.8)

T3 121 (70-170)

TSH 1.21 (0.40-5.50)

11/6/02 (felt hypo)

FT4 0.7 (0.8-1.8)

T3 85 (70-170)

TSH 1.03 (0.40-5.50)

9/25/02

FT4 1.2 (0.8-1.8)

T3 - not done

TSH undetected (0.40-5.50)

(Started 300mg PTU at beginning of Sept.)

8/14/02 (felt very hyperT!!)

FT4 2.5 (0.8-1.8)

T4 13.2 (4.5-12)

T3 242 (70-170)

TSH undetected (0.40-5.50)

TSI 314 (<125)

Thyroid peroxidase AB 617 (0.0-2.0)

Thyroglobulin AB 1444 (<2.0)