Structural analysis of two different stent configurations.
Two different stent configurations (i.e. the well known Palmaz-Schatz (PS) and a new stent configuration) are mechanically investigated. A finite element model was used to study the two geometries under combining loads and a computational fluid dynamic model based on fluid structure interaction was developed investigating the plaque and the artery wall reactions in a stented arterial segment. These models determine the stress and displacement fields of the two stents under internal pressure conditions. Results suggested that stent designs cause alterations in vascular anatomy that adversely affect arterial stress distributions within the wall, which have impact in the vessel responses such as the restenosis. The hemodynamic analysis shows the use of new stent geometry suggests better biofluid mechanical response such as the deformation and the progressive amount of plaque growth.
a Department of Civil Engineering, Architecture and Georesources (DECivil) and CEris researcher , Instituto Superior Técnico, Universidade de Lisboa , Lisbon , Portugal.
M
M
Simão
b Faculty of Medicine, Researcher from Academic Medical Center of Lisbon Hospital Sta. Maria , Universidade de Lisboa , Lisbon , Portugal.
J M
JM
Ferreira
c Geomatics and Hydraulic Engineering Department , Universidad de Guanajuato , Guanajuato , Mexico.
J
J
Mora-Rodriguez
d Department of Civil Engineering, Architecture and Georesources (DECivil) and CEris member , Instituto Superior Técnico, Universidade de Lisboa , Lisbon , Portugal.
H M
HM
Ramos
D001158:Arteries / Q000503:physiopathology; D001783:Blood Flow Velocity; D003198:Computer Simulation; D003251:Constriction, Pathologic / Q000503:physiopathology; D020342:Finite Element Analysis; D006801:Humans; D057446:Hydrodynamics; D008955:Models, Cardiovascular; D015203:Reproducibility of Results; D015607:Stents; D013314:Stress, Mechanical; D014783:Viscosity
Finite element methods (FEM); computational fluid dynamic (CFD); restenosis; stent-artery interactions