‘X-ray
GPS’ system allows KU Hospital to navigate the heart
New X-ray system is like GPS, giving doctors a
base map while cutting patients’ exposure to radiation.
BY
SANGEETA SHASTRY
Dhanunjaya
Lakkireddy uses a system that pairs GPS and X-ray technology to guide catheters
during heart procedures. The system, in use at the University of Kansas
Hospital, reduces patients’ exposure to radiation.
Breaking News
The technology that’s been guiding the GPS navigator in your car
has started working its way into the hearts of patients at the University of
Kansas Hospital.
Doctors there are the first in the country to use a new system
that allows them to drastically reduce the amount of radiation used while they
insert catheters to treat heart abnormalities.
“There’s been a real movement over the last year or two with doctors
trying to crack (down on) how much X-ray exposure patients have over their
lifetime,” said Loren Berenbom, director of the hospital’s Richard and Annette
Bloch Heart Rhythm Center.
Here’s how it works: Typically, doctors use fluoroscopy, or a
rapid sequence of X-rays, to see the heart and find their way around with a
catheter. That method, however, results in relatively long periods of radiation
— anywhere from 15 or 20 minutes to an hour or more for complex procedures.
With the new system, called MediGuide Technology, doctors need
to use radiation just once, for a much shorter time, instead of using it
throughout the procedure. The X-ray serves as a base map.
Then they use catheters with sensors at their tips that form a
three-dimensional world inside the patient’s body, showing doctors where they
are inside the heart and guiding them to the damage they need to repair.
“A lot of the medical technology has moved toward the adoption
of GPS technology,” said Dhanunjaya Lakkireddy, an electrophysiologist at the
hospital. “This is one other way of making a procedure more safe.”
Lakkireddy said the new system, which was approved for use in
2009 by the Food and Drug Administration, was an “enormous” step in efforts to
minimize the amount of radiation patients are exposed to during procedures.
MediGuide, from St. Jude Medical Inc., was first used in
Leipzig, Germany, where doctors from KU Hospital traveled for training. Seeing
the technology at work firsthand made it easier for doctors to adopt it at
home, said cardiologist Raghu Dendi.
The first patient at KU was 53-year-old Sarah Howard of Holt,
Mo., who has supraventricular tachycardia, a rapid heart rhythm that originates
above the ventricles of the heart.
Doctors had used the traditional procedure to treat her
condition in the past, and she was excited about the shorter period she’d be
exposed to radiation this time.
“When I found out I was the first person in the country, I felt
like I won the lottery,” she said, laughing.
Howard’s procedure normally would have required her to be
exposed to 15 to 20 minutes of fluoroscopy. It took doctors only four minutes’
worth of radiation with the new technology.
In a procedure done on another patient Monday morning, doctors
were able to cut the amount of time spent under radiation by about 90 percent.
“We know it’s safer for the patient,” cardiologist Martin Emert
said. “We know it’s safer for us and our staff. It’s a technology that makes
things better without being harmful.”
Cardiologist Rhea Pimentel works with young patients for whom
the long-term effects of radiation are uncertain.
“You always have that concern when you’re doing these
procedures,” she said. “What’s going to happen 20 years from now? This sort of
allows us the freedom to do these procedures without the worry.”
The procedure has a sizable price tag, Berenbom said, but the
hospital has absorbed most of the cost, and patients shouldn’t see increased
charges because of it.
Now, it’s full speed ahead for the hospital. Dendi, Emert and
Pimentel returned from Germany on Wednesday, and by Thursday’s end, Emert had
done two procedures with the new technology. The doctors looked at the ceiling
as they counted out how many times they’ve used MediGuide.
So far, seven.
"No time like the present, right?" Pimentel said
"No time like the present, right?" Pimentel said
I wonder how this GPS work for my body, do I will allow this happen to me? hmmmm so hard to explain when you are not the one who need it the most ...
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