Understanding the Colonoscopy
You may have heard about someone having a colonoscopy.
However, you are not sure exactly what that entails. Here are some
basic facts about a colonoscopy, why doctors recommend them, and
how to prepare in the event your doctor tells you that the time
has come for a colonoscopy.
There are actually two types of colonoscopies. The most common
type is an invasive procedure that can be done in a surgical center
or a hospital on an outpatient basis. Essentially, the patient will
be sedated and the colon and small bowel will be examined by using
a small camera that is attached to a thin tube. The thin tube is
introduced into the body by way of the anus. The tube is fed into
position as the camera allows the attending physicians to observe
any abnormalities that may be forming along the way.
Arriving at the colon, the doctors may observe the presence of
polyps. As part of the colonoscopy, the camera
and tube device can actually remove the polyp and retrieve it for
the purpose of conducting a biopsy. The results of the biopsy will
determine if further methods will need to be employed.
This type of colonoscopy also is used to look for other problems
as well. As an example, a colonoscopy may aid in determining and
treating irritable bowel disease, checking for obstructions that
may be causing anemia or similar problems.
The second type of colonoscopy, which is called a virtual colonoscopy,
is a completely non-invasive way of looking at what is going on
in the colon and bowel area. Utilizing computer imagery that works
with CT scans and MR scans, the doctor can observe the condition
of the colon and bowels and based on the images projected decide
if further treatment, perhaps using an invasive colonoscopy is warranted.
One of the main objections to the virtual colonoscopy
is that no polyps or other matter can be collected for examination.
As a result, the patient will have to endure another round of testing
before answers may be made known about his or her true condition.
For this reason, some doctors prefer to go ahead with the minimally
invasive type of colonoscopy, reasoning that the patient does not
need a long recover time and that if there is something that needs
a biopsy, it can be collected at once.
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