Blood is known spiral as it flows through the arteries, but researchers at a conference Royal Academy of Engineering announced yesterday in London that the helical flows Whirl like a corkscrew. In addition, the twists and branches of blood vessels promote the swirling flow, which runs through the plaque and helps prevent atherosclerosis.
Until recently, researchers lacked the power of the computer to accurately model the blood flow in the complex, three-dimensional geometries, said Spencer Sherwin, a fluid dynamicist at Imperial College London science, technology and medicine. But a new computer program written by Sherwin and colleagues seems to have finally managed to accurately model the arterial blood flow: Their calculations correspond to the MRI data on the speed of blood within the arteries, says Danesh of Tafti national Center for Supercomputing Applications in Champaign, Illinois.
the new program could open the way for more sustainable arterial grafts, natural or artificial replacements for the arteries, which do not work mate Colin said Caro, a physiologist also at Imperial College. About half of arterial grafts fail in 10 years, after being blocked by a thickening of the inner wall. This can happen because surgeons tend to join grafts perpendicular to the vessel wall in a single flat plane, rather than the curve as a freeway onramp that ships are natural.
teamSherwin now considering the use of simulations and real arteries MRI to determine the optimum angle of arterial grafts to maintain swirling blood flow that could prevent blockages.
"the results of the blood are obviously important to improve arterial graft construct," said Michael Bettmann, a cardiovascular specialist at Medical Center Dartmouth-Hitchcock Dartmouth in New Hampshire, "but they can also be useful to the development of new techniques, primarily those not operating for the treatment of peripheral arterial disease. "
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