British scientists make artificial arteries

Subject:	British scientists make artificial arteries
Date:	03 Jan 2010 19:17:17 GMT

British scientists make artificial arteries
Sun, 03 Jan 2010 14:13:38 GMT

British scientists have developed a strong, flexible, and
resistant to blood clotting artificial artery that pulses
rhythmically to match the beat of the heart.
http://www.presstv.ir/photo/20100103/khashayar20100103163027968.jpg

In existing surgical treatments, a plastic graft or
preferably a vein taken from the patient's leg is used to
bypass or replace the damaged vessel; many patients,
however, do not have suitable veins.

Plastic arteries that are available for grafting are made
from the same nylon used in clothing. They therefore are not
flexible enough to pump the blood; their surface also
stimulates the clotting process. Such a technology has been
less successful for grafts of less than 8mm.

The new bypass grafts, made from polymer material using
nanotechnology, can mimic the natural pulsing of human blood
vessels and therefore deliver nutrients to body tissues.

The wall of these arteries is in fact strong enough to
withstand blood pressure throughout an individual's life.

London's Royal Free Hospital researchers hope these arteries
can soon be used to save the life of thousands of patients
with vascular diseases early this year.

"We welcome this interesting development, which could
potentially be of enormous benefits to patients who need a
bypass operation to treat their coronary heart disease,"
said Judy O'Sullivan of the British Heart Foundation.

PKH/HGH
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http://www.presstv.ir/detail.aspx?id=115254§ionid=3510210
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