Comput Math Methods Med - A literature review of the numerical analysis of abdominal aortic aneurysms treated with endovascular stent grafts.

Tópicos

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Resumo

The purpose of this paper is to present the basic principles and relevant advances in the computational modeling of abdominal aortic aneurysms and endovascular aneurysm repair, providing the community with up-to-date state of the art in terms of numerical analysis and biomechanics. Frameworks describing the mechanical behavior of the aortic wall already exist. However, intraluminal thrombus nonhomogeneous structure and porosity still need to be well characterized. Also, although the morphology and mechanical properties of calcifications have been investigated, their effects on wall stresses remain controversial. Computational fluid dynamics usually assumes a rigid artery wall, whereas fluid-structure interaction accounts for artery compliance but is still challenging since arteries and blood have similar densities. We discuss alternatives to fluid-structure interaction based on dynamic medical images that address patient-specific hemodynamics and geometries. We describe initial stresses, elastic boundary conditions, and statistical strength for rupture risk assessment. Special emphasis is accorded to workflow development, from the conversion of medical images into finite element models, to the simulation of catheter-aorta interactions and stent-graft deployment. Our purpose is also to elaborate the key ingredients leading to virtual stenting and endovascular repair planning that could improve the procedure and stent-grafts.

Resumo Limpo

purpos paper present basic principl relev advanc comput model abdomin aortic aneurysm endovascular aneurysm repair provid communiti uptod state art term numer analysi biomechan framework describ mechan behavior aortic wall alreadi exist howev intralumin thrombus nonhomogen structur poros still need well character also although morpholog mechan properti calcif investig effect wall stress remain controversi comput fluid dynam usual assum rigid arteri wall wherea fluidstructur interact account arteri complianc still challeng sinc arteri blood similar densiti discuss altern fluidstructur interact base dynam medic imag address patientspecif hemodynam geometri describ initi stress elast boundari condit statist strength ruptur risk assess special emphasi accord workflow develop convers medic imag finit element model simul catheteraorta interact stentgraft deploy purpos also elabor key ingredi lead virtual stent endovascular repair plan improv procedur stentgraft

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