Creatiinine Urine Test And Creatinine Blood Test Quest., Please

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Robert11 - 26 Sep 2004 23:55 GMT

Hello:

I understand that there is a Creatinine Blood Test, and also a Creatinine
Urine Test.

Might someone please explain when each is used, and what each determines ?

e.g.,

when would one test be used rather than the other ?

what parameters, and their significance, might one show that the other
wouldn't ?

any other differences, etc. ?

Much thanks,
Bob

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Robert - 28 Sep 2004 19:29 GMT

> Hello:
>
> I understand that there is a Creatinine Blood Test, and also a Creatinine
> Urine Test.
>
> Might someone please explain when each is used, and what each determines ?

Any particular reason or specific reason why you ask?
Are you a student?

> e.g.,
>
> when would one test be used rather than the other ?

The serum one is used to evaluate renal function and the urine one is used
in evaluating other urine analytes in terms of a ratio between the two such
as protein/creat ratio. It eliminates the wide variance in concentration of
urine by standardizing it to a urine creatinine ratio.

> what parameters, and their significance, might one show that the other
> wouldn't ?

The serum creatinine is a better index of glomerular filtration than the
actual measure of a 24 hour urine collection and measuring the urine
creatinine. Several reasons for that.

> any other differences, etc. ?

Many more, why?

> Much thanks,
> Bob

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