Anyone shed any light on this? After some recent blood tests to ascertain thyroid function, my doc told me everything was normal, so I forgot all about it. However, I've since looked into what the normal ranges are for the tests she did, and now I'm a bit concerned about something.
My TSH is 0.9 and I read that the normal range is 0.3 - 3.0, but my Free T4 is 16.8 and I've read that the normal range is 0.7 - 2.0.
Am I missing something here? Has my doctor made a complete oversight or am I worrying about nothing?
I went to see her about an inability to lose weight, despite exercising two hours a day and eating like a saint. I also have PCOS and have recently been put on Metformin, although wasn't on any medication when these tests were taken.
Can anyone confirm that the ranges I've specified above are correct, and if so, what might such a high Free T4 result actually mean?
Cheers and thanks.
2006-10-21 14:06:53 · 5 answers · asked by Anonymous in Health ➔ Women's Health
Get a copy of your labs. It will have your test results, and the normal range for each test. Every lab can have a different normal range. You can't go by some normal range that you read somewhere. It may be completely different from the normal range your lab uses.
When you get a copy of your labs, post your results with the normal ranges, and then we can talk about what they mean.
2006-10-21 14:16:09 · answer #1 · answered by Lisa A 7 · 0⤊ 1⤋
Your test results can mean two things. First, the reading that is "abnormal", does it have a ng/dL or a pmol/L next to it? If it is the ng/dL, that means you actually have hyperthyroidism, which would mean you would have the metabolism of a shrew and be chronically underweight. If the lab value has a pmol/L next to it, then your reading is perfectly normal, which is anywhere from 19-36. Pregnancy and hormone replacement can cause your free T4 to be high.
I don't know how much your doc explained about T4, so hear is a REALLY brief run down: around 95-99% of the T4 in your blood is bound to the proteins in your blood and therefore doesn't do much. The other 1-5% is the T4 that is actually active in metabolism, which is why if there is a lot of free T4 running around, you will have an over active thyroid. Usually, in patients having high T4 levels who don't seem to have symptoms of hyperactive thyroids, the reason is usually something that affects the blood proteins (eg. pregnancy and hormone replacement). Again, it all depends on the units (ng/dL, pmol/L) that the test is measured in.
2006-10-21 15:17:46 · answer #2 · answered by lilia_164 2 · 1⤊ 0⤋
T4 Free 1.07
2015-06-01 07:52:57 · answer #3 · answered by Jay 1 · 0⤊ 0⤋
TSH <0.01 T3 = 4.4 T4=16.8
2017-04-06 12:09:11 · answer #4 · answered by Anonymous · 0⤊ 0⤋
1
2017-02-09 00:20:08 · answer #5 · answered by wilson 4 · 0⤊ 0⤋