Health information

QUESTION: Can you explain the use of a test called “DSA” for a problem that
seems to involve poor circulation
We can’t find this in our “Home Medical
Advisor” and need this information badly
Please help?

ANSWER: Check the publication date in your “Advisor”
It is probably a bit
older than you realized
DSA stands for Digital Subtraction Angiography, one
of the newest medical techniques on the scene
It is the result of combining
x-ray and computer technology to study the heart and arteries without the
risks associated with conventional angiography.
In DSA, x-ray images are digitally recorded into a computer, instead of
photographic film
Rather than capturing a few isolated frozen images, the
computer is capable of recording these images continuously over time as if it
were making a videotape
As in conventional angiography, a contrast medium is
injected into the body to make the structures more visible to the x-ray
camera
However, DSA produces superior images with smaller amounts of the
contrast medium, and allows the contrast material to be injected into a vein
rather than an artery, reducing the risk to the patient.
Once the images are stored in the computer, they can be retrieved at any
time for additional study
Certain anatomical features that block a desired
view can be removed by “subtracting” them electronically from the image
DSA
is constantly being improved (it cannot match conventional angiography in all
situations), but it is already one of the most exciting examples of the impact
of computers on medicine.

The material contained here is “FOR INFORMATION ONLY” and should not replace
the counsel and advice of your personal physician
Promptly consulting your
doctor is the best path to a quick and successful resolution of any medical
problem.

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