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do c14 ubt bad for healthy?
Posted: Thu Apr 03, 2014 12:22 pm
by klo2008
just did the C14 ubt and had a 37bpq capsule, as I know C14had radioactivity,
I kow most of it will be ex
but how much will left in body?
will it last for whole life?
someone say the c14 will take part in the form of basic group, so will it be part of body any harm body every day?
I am afraid it radioactivity me everyday, any expert can answer?
Re: do c14 ubt bad for healthy?
Posted: Fri Apr 04, 2014 10:06 am
by Helico_expert
stud
studies from the University of Virginia, three HP—subjects excreted more than 75% of ingested urea in a three-day urine collection.
The largest calculated effective dose equivalent for the 14C "Microdose" breath test (HP+ female) is 0.08 mSv/MBq. The effective dose equivalent (Global mean) to an average person from natural sources was recently reported by UNSCEAR to be 2.4 mSv/yr. Approximately 800 14C-urea "Microdose" breath tests kBq per test) would generate the same effective dose equivalent. Therefore, it may be concluded that the relatively few 14C-urea breath tests an individual may receive per year will contribute insignificantly to their radiation exposure.
http://www.helico.com/sites/default/fil ... ns/A49.pdf
There is an article by Prof. Marshall himself discussing the dose of C14 in the body. It's a good article for your reference.
Re: do c14 ubt bad for healthy?
Posted: Sat Apr 05, 2014 1:20 am
by klo2008
thanks.
As I learn from here:
http://www.drugs.com/pro/pytest.html
It is also not known whether PYtest1 can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. PYtest1 should be given to a pregnant woman only if clearly needed.
My question is :
1. I am a yound woman about 25 years, whether PYtest1 can affect reproduction capacity?
2. If I want to be pregnant, how long should I wait until I can be pregnant after the C14 pytest?
Re: do c14 ubt bad for healthy?
Posted: Mon Apr 07, 2014 9:13 am
by Helico_expert
1. I dont think it will affect your pregnancy capability. I based on the experience that many young female patients did the test and turns out ok with their pregnancy.
2. I dont think there should be any worry for pregnancy planning. based on the fact that you are already exposed to much higher radiation from air, food, drinking water and cosmic ray.
check reference below.
https://hps.org/documents/environmental ... _sheet.pdf
https://en.wikipedia.org/wiki/Background_radiation
Note: I am a microbiologist. My answer to radiation may not be accurate. I welcome any medical radiation expert to correct me.
Re: do c14 ubt bad for healthy?
Posted: Mon Apr 07, 2014 3:49 pm
by klo2008
Thanks, I know " based on the fact that you are already exposed to much higher radiation from air, food, drinking water and cosmic ray."
but my question is that, as we know C14 ubt effect is equal to expose under sun with 22 hours, but could the effect from outside to organ insider body be equal to C14 which we take inside our body to our organ?
I am not sure whether I express clearly.
Please reply patiently.
thanks very much.
Helico_expert wrote:1. I dont think it will affect your pregnancy capability. I based on the experience that many young female patients did the test and turns out ok with their pregnancy.
2. I dont think there should be any worry for pregnancy planning. based on the fact that you are already exposed to much higher radiation from air, food, drinking water and cosmic ray.
check reference below.
https://hps.org/documents/environmental ... _sheet.pdf
https://en.wikipedia.org/wiki/Background_radiation
Note: I am a microbiologist. My answer to radiation may not be accurate. I welcome any medical radiation expert to correct me.
Re: do c14 ubt bad for healthy?
Posted: Mon Apr 07, 2014 4:53 pm
by Helico_expert
I am sorry I cannot answer your question further. Perhaps you can find more info in this article.
http://www.ncbi.nlm.nih.gov/pmc/article ... 550479.pdf