What are the reference ranges for T3 and T4 and other advice please.

[jaxnbreeze]

I am wondering what the ref. ranges are in over parts of the country. In Lincs they are 2.3-4.2 for T3 and 4.5 -12.4 for T4. My recent test showed TSH1.1 (range 0.36-4.94) T3 4.44 and T4 16.8. Do they sound OK to you? At the moment I am recovering from a serious operation I had 6 weeks ago. Thanks, Jax

[susymac]

Ranges at leighton (cheshire east) is TT3 1.1-2.6 ; FT4 9-23 ; TSH 0.2-4.5

But what ever your result is is relevant only to the range in which it was done, so yours being over in the ranges they were done would still be over in other ranges as the result would be different.

No idea if recovering from an op makes a difference or not, possibly does if you are using a lot less.

[Hidden]

I am in Oxfordshire and mine are:-

TSH - 0.35 - 5.5 mU/L

FT4 - 10.5 - 20 pmol/L

FT3 - 3.5 - 6.5 pmol/L.

Susymac is right in that you have to go by the reference ranges in your region. Are the measurements the same in your region i.e. pmol/L? Susymac has given TT3, so this is presumably a different range from FT3, well I assume its not the same as FT3 - or is it?

It always amazes me as to how different ranges are in different counties, assuming they are all NHS labs. I could move around the country and be under in one, over in the next, and just fine in another.

[susymac in reply to Hidden]

No its different, some labs do FT3 others do TT3 but never both.

and you wouldn't be under in one and over in another, this is a misconception. Your actual result would differ depending on the range it was tested under. Which is why knowing the test ranges are so important

ie a result of 3 in a range of 2- 4 would be the equivolent of 2.5 if the range was 0 - 5 (simplified example but I cant be bothered with maths today )

[Hidden in reply to susymac]

Thank you, I understand the significance of ranges but had never come across the TT3 test. Was familiar with the TT4. I have learned something today - which is not a bad thing.

Cheers

Jan

[jaxnbreeze]

Thanks everyone - I think the T4 range should be 4.5 - 20.4 and not 12.4 which is huge difference. Will check again with the nurse but think there's a mistake as all the other ranges seem about in line with this area.