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Home > Archive > Radiology > November 2005 > Gallium scan and antibiotics.
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Gallium scan and antibiotics.
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| stryped@hotmail.com 2005-05-18, 11:25 am |
| I am having a Gallium scan tomorrow. I have been prescribed antibiotics
from another doctor. WIll it effect my test to take these?
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| Repeating Rifle 2005-05-18, 11:25 am |
| in article 1115664193.373636.134100@f14g2000cwb.googlegroups.com,
stryped@hotmail.com at stryped@hotmail.com wrote on 5/9/05 11:43 AM:
> I am having a Gallium scan tomorrow. I have been prescribed antibiotics
> from another doctor. WIll it effect my test to take these?
>
With the caveat that I am not trained medically, I will try to answer your
question. Nevertheless, what I say is worth no more than you paid for it.
You do not say what form the gallium is in, how much is used, or what the
purpose is. Because it is on this forum, I presume that it is a radioactive
isotope of some kind. The amount of gallium, therefore, is going to be so
small that it will not have any effect on radio-opacity.
It is unlikely that there will be an attraction between the gallium compound
used and the antibiotic. Thus my guess is that your measurement will not be
affected. But what do I know? I do note that gallium is a transition metal
in a group that does not strike me as being particularly biologically
active.
Bill
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| I.M.I DE L'I.L.P 2005-05-18, 11:25 am |
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| imabug 2005-05-18, 11:25 am |
| For future reference, the best place to ask this type of question is
the facility where you are having the scan performed. They will be
able to tell you over the phone (probably after consulting with their
radiologist) if any medications you are taking will interfere with the
scan. They will also tell you about any prep procedures you will need
to follow before the scan (no eating from the night before, no
caffeine, etc).
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| Steve Madison 2005-11-28, 12:59 am |
| stryped@hotmail.com wrote:
> I am having a Gallium scan tomorrow. I have been prescribed antibiotics
> from another doctor. WIll it effect my test to take these?
>
I know this is a little late but I wanted to clarify a few things. The
Gallium scan you are recieving is a nuclear medicine scan. Areas of
acute infection release large amounts of histamine, bradykinin and
serotonin which increase blood flow and capillary permeability. This
results in edema (increased fluid and proteins). In a Gallium scan,
radioactive gallium citrate (5 mCi of Ga-67) is injected intravenously.
The Ga-67 dissociates rapidly and binds to serum proteins (primarily
transferrin). Since a site of infection has increased blood flow and
accumulation of fluid and proteins, the radioactive gallium will
accumulate there over time. Routinely images are acquired (with a gamma
camera) 24 hours after injection. Normally the gallium accumulates in
the liver, bowel, kidneys, bone, and the lacrimal and salivary glands.
Other sites of accumulation would indicate an infection.
As for your question about antibiotics: no they will not interfere with
the test. The test is dependent on the increased fluid and protein
content at the site of infection, not the status of bacteria.
Steve Madison, MRT(N)
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