Document Detail


Hemodynamics of endovascular prostheses.
MedLine Citation:
PMID:  9596537     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A surgical study (Bergeron et al., 1991, International Angiology 10(3), 182-186) picked out that re-endothelialization of implanted expandable stents, frequently used to reduce the recurrent stenosis rate after balloon angioplasty, was correct and more rapid in femoro-popliteal arteries (quasi-straight vessels) than in iliac arteries (bifurcated vessels). Since it is now well known that local hemodynamics are considered to be an important atherogenic factor, we decided to compare and optimize the shape of the existing equipment, in order to further give some informations to surgeons about the optimal stenting at the site of bifurcation. Therefore, we studied in vitro (1) the influence of the protruding part of a stent on the flow patterns in the branches of an aorto-iliac bifurcation model, and (2) the possibility of reducing or preventing this impact. Qualitative information was obtained from visualizations in the horizontal median plane of the bifurcation model, while Doppler ultrasonic velocimetry provided quantitative data, at different points of the cardiac cycle. Results showed that a standard stent implanted in a daughter branch of the bifurcation may have a considerable influence on flow behaviour when it is sticking out of the daughter branch. A new design of stent, with a bevelled shape, showed a significant reduction of flow disturbance.
Authors:
S Fabregues; K Baijens; R Rieu; P Bergeron
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of biomechanics     Volume:  31     ISSN:  0021-9290     ISO Abbreviation:  J Biomech     Publication Date:  1998 Jan 
Date Detail:
Created Date:  1998-07-17     Completed Date:  1998-07-17     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0157375     Medline TA:  J Biomech     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  45-54     Citation Subset:  IM    
Affiliation:
Ecole Supérieure de Mécanique de Marseille, IRPHE CNRS UMR 6594, Laboratoire de Biomécanique Cardiovasculaire, France.
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MeSH Terms
Descriptor/Qualifier:
Aorta / physiology
Blood Flow Velocity / physiology
Blood Vessel Prosthesis*
Equipment Design
Hemodynamics / physiology*
Humans
Iliac Artery / physiology
Models, Cardiovascular*
Stents
Stress, Mechanical
Ultrasonics

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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