Hello Pam,
you cannot find a half life because the Urea C13 breath test does not
involve a radioisotope. C-13 is a stable (non-decaying) isotope of Carbon.
The test can alternatively be performed with C-14, which is a radioacive
carbon isotope.

I hope this helps.

Veronica

Veronica Garea (ME Nuclear Eng., PhD Eng. Physics)
LLL Argentina

>   5. urea carbon 13
>
> Date:    Thu, 26 Apr 2007 13:59:52 -0400
> From:    Pam MazzellaDiBosco <[log in to unmask]>
> Subject: urea carbon 13
>
> I have searched the archives and find one reference to this from 1998.  I
> am
> looking for anything more recent.  Mom has 18 week old baby, and the
> doctor
> wants her to have a breath test.  She called the manufacturer, and whoever
> answered can't even give her a half life.  I can't find it in the usual
> mother/medication/milk sources, though I am learning a lot about the test
> itself. What I need to find is something to share witih the mother so she
> can make a decision about having this test.
>
> Thanks,
> Pam MazzellaDiBosco, IBCLC, RLC
> Florida, USA

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