Urine testing?

[linteater]

So I've been trying to figure out my thyroid.  I was diagnosed as hypothyroid, but while on the pills my face keeps flushing and I sweat profusely, even though my TSH is in the normal range.

My doctor ordered a 24-hour urine test, but it's going to be weeks before I'm home for a 24 hour period.  I was thinking about testing on Sunday, but I have a baby shower then and don't want to be carting around my urine.  Does anyone know if "holding it" until I get home (maybe four hours-ish?) would screw up the test?

[linteater]

It might, although I"m not sure.  I told the doctor that I my face has been flushing off and on, and he said there were many hormonal imbalances that could cause that and asked me to do the 24 hour urine test.  

I ended up just boiling a mason jar and taking it with me in my purse when I could bring the 3000ml jug with me.

Thanks for your help!

[Barb135]

"I just meant keeping my legs crossed until I was in a convenient place.."  I understood that, I meant that most samples have to be analyzed within a certain period of time after collection (that's called a "holding time"), so  you'd need to check with your doctor or lab to see if your collection time(s) would be in line with appropriate analysis times....

Other than that, I doubt it would make a difference, except that the longer you "hold" it, the more concentrated the urine might be.  

Could this 24 hr test by any chance have to do with adrenal function?

[linteater]

I'm not sure what the urine test is for; maybe other hormones that could be interacting with my thyroid?  

I just meant keeping my legs crossed until I was in a convenient place...

[Barb135]

Thyroid tests aren't typically done on a 24 hr basis, or with urine; what specific tests are being done on the urine?  

Most samples have a "holding time", which  means there's only a certain amount of time between when collected and analysis........ you will have to check with your doctor/laboratory as to how soon you need to need to submit the sample to the lab.......