Regular readers will recall recent posts about the increasing use of tiny pill cameras to diagnose gastrointestinal problems in the esophagus
and upper stomach.
This report from John Vargo, MD, MPH, member of the section of therapeutic endoscopy, department of gastroenterology and hepatology,
Cleveland Clinic Foundation, Cleveland looks deeper into this new technology with a camera the size of a pill being used as an alternative to troublesome endoscopy.
Imagine a pill about a half-inch by an inch — with a
light and a digital camera packed into each end.
When you swallow the pill, each camera snaps seven high-quality color photos per second of the trip through your esophagus, stomach and into your intestines.
Then it transmits those images via radio signals to a
digital recorder that’s strapped to your waist (electrodes are
attached to your abdomen to help pick up the signal). In about 20
minutes, the esophageal part of the screening is done — no sedation,
no discomfort. Your doctor then views the digital photos, looking for
abnormalities that could signal a problem. The pill normally passes
through the entire digestive tract in 24 hours.
The technology itself is an update of a pill camera that was first
released four years ago as a way to snap photos of the small
intestine, which is a complicated part of the anatomy and difficult
to view with a traditional endoscope. That camera only snapped two
photos per second, from one end of the capsule. The new pill packs
twice the punch.
“My feeling is that we must be careful with new technology, and this
is a wonderful technology,” says John Vargo, MD, MPH, a member of
the section of therapeutic endoscopy, department of
gastroenterology and hepatology at the Cleveland Clinic Foundation.
“The data we have on the esophageal capsule is preliminary, but it
does suggest great potential. In my opinion, there are going to be
some tremendous uses for this pill in the future.”
THE PROBLEM WITH PILLS
As exciting as the pill camera is, there are still a few issues
with it…
* It’s not for everyone. If you have swallowing difficulties, it
might be tough to take the pill, which isn’t small. Because of the
radio-wave transmissions, the high-tech pill isn’t recommended for
people with pacemakers or implanted defibrillators. And, in some
cases where there’s been a narrowing of the GI tract (often seen in
sufferers of a chronic inflammatory bowel disease, such as
Crohn’s), the pill can cause an obstruction… and that means
surgery.
* Technology failure. Another (albeit rare) possibility that’s more
of an annoyance: No pictures. “[The camera is] quite reliable,” Dr.
Vargo says. “We only have approximately a 2% failure rate for
transmission, for whatever reason.”
Aside from those complications, the pill camera has two other
shortcomings, both of which relegate it to screening-tool-only
status. First, there’s no way to take a biopsy of suspect tissue —
a major benefit of traditional endoscopy. Second, “There are no mile
markers in the small intestine,” says Dr. Vargo, “so one small
drawback is not knowing exactly where the pathology is. We currently
use the overall transit time of the capsule, but that is somewhat
variable.” Still, as a screening tool, the pill capsule is hard to
beat. The camera images are very high resolution, with a 1:8
magnification — higher than that of traditional endoscopes. That
allows for very, very close-up views of problem areas. In fact, the
capsules allow physicians to view objects as small as 0.1 mm — about
the width of a piece of paper. Plus, during the five- to 10-minute
esophagus-imaging procedure, the camera takes about 2,600 images
with a field of view of 140 degrees, which means that the chances of
overlooking an important area are slim.
HIT WHERE IT COUNTS
According to Dr. Vargo, the pill capsule procedure has been priced at
about the same as a traditional endoscopy. As use of the technology
becomes more widespread, the price is likely to drop. However, it’s
the camera’s side benefits that allow it to offer real savings, both
to patients and insurance companies alike.
“With traditional endoscopy, there’s sedation and recovery time
and all the costs and complications associated with that,” says Dr.
Vargo. “But with the capsule, you can drive yourself in and there’s
no down time. If you have a small bowel capsule, you can
essentially put [the recorder] on, go about your normal routine, and
come back eight hours later.” You’re saving time, and your doctor
isn’t tied up with a complicated piece of equipment for a 30-minute
or longer procedure — he/she simply reads the photos when the test
is over. It’s a win-win situation.
THE SCREENING OF THE FUTURE
Dr. Vargo sees a day when the pill camera technology is so refined
that it can screen the entire GI tract for a broad range of ailments.
What’s more, you may not even need to visit a doctor’s office for a
screening. Instead, you could get a package at home, follow the
enclosed instructions, download the images to your own computer
and send them to your doctor.
For now, should your doctor suggest an endoscopic procedure, ask
if a pill version is an option for you. The technology is not yet
widespread, but it is becoming more widely used. You can learn
about where it is available by clicking on the physician locator
at givenimaging.com.
www.fitness-health-beauty.com
www.acidrefluxheartburn.com