Delivery and release of nitinol stent in carotid artery and their interactions: A finite element analysis

Wu, Wei; Qi, Min; Liu, Xiaopeng; Yang, Di; Wang, Weiqiang

doi:10.1016/j.jbiomech.2007.02.024

Cited by 107 publications

(84 citation statements)

References 20 publications

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“…The ability of nickel -titanium alloy to recover the original shape (pseudo-elastic effect) is described by the use of a previously developed user subroutine . Average values are used for material parameters (Migliavacca et al 2004;Wu et al 2007), since the specific properties for the neuroform stent are not available. The corresponding uniaxial stress -strain curve is depicted in Figure 3 (left).…”

Section: Geometry Models and Materials Propertiesmentioning

confidence: 99%

“…In this regard, Finite element (FE) analysis could be used to study the mechanical behaviour of stents and their interaction with the vascular wall during its deployment. Actually, while an extensive application of FE modelling for simulating the treatment of vessel stenoses can be found in the literature (Migliavacca et al 2004;Wu et al 2007;De Beule et al 2008;Gijsen et al 2008;Early et al 2009;Mortier et al 2010), to date the amount of similar studies on cerebral aneurysm treatment has been very limited. In fact, the Finite Element method (FEM) allows very complex models to be developed, including high non-linearity due to material properties (for instance, Holzapfel et al 2005, for the biomechanics of coronary arteries, and Petrini et al 2005, for the material properties of the stent) and kinematics, which facilitate accurate description of the stenting procedure.…”

Section: Introductionmentioning

confidence: 99%

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Deployment of self-expandable stents in aneurysmatic cerebral vessels: comparison of different computational approaches for interventional planning

Bernardini

Larrabide

Petrini

et al. 2012

Computer Methods in Biomechanics and Biomedical Engineering

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JOB NUMBER: 527838 JOURNAL: GCMB Q1 Please check the affiliation details 'a and c'. Q2The reference citation 'Appanaboyina et al. (2007)' has been changed to 'Appanaboyina et al. (2008)' as per the reference list. Please check and confirm. Q3We have made a change to this sentence. Please review our edit.Q4 Please confirm our edit of the word 'modulus' to 'ratio' in this sentence. In the last few years, there has been a growing focus on faster computational methods to support clinicians in planning stenting procedures. This study investigates the possibility of introducing computational approximations in modelling stent deployment in aneurysmatic cerebral vessels to achieve simulations compatible with the constraints of real clinical workflows. The release of a self-expandable stent in a simplified aneurysmatic vessel was modelled in four different initial positions. Six progressively simplified modelling approaches (based on Finite Element method and Fast Virtual Stenting -FVS) have been used. Comparing accuracy of the results, the final configuration of the stent is more affected by neglecting mechanical properties of materials (FVS) than by adopting 1D instead of 3D stent models. Nevertheless, the differences showed are acceptable compared to those achieved by considering different stent initial positions. Regarding computational costs, simulations involving 1D stent features are the only ones feasible in clinical context.

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Section: Geometry Models and Materials Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Deployment of self-expandable stents in aneurysmatic cerebral vessels: comparison of different computational approaches for interventional planning

Bernardini

Larrabide

Petrini

et al. 2012

Computer Methods in Biomechanics and Biomedical Engineering

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“…Table 2. Stent material parameters [8,10]. In this analysis the "element birth and death" command was introduced to activate and deactivate the elements during the calculation.…”

Section: Contact Conditions and Death And Birth Of Elementsmentioning

confidence: 99%

“…Since inappropriate stenting (e.g., overexpansion and insufficient expansion) results in the undesirable clinical events such as neointimal hyperplasia, restenosis, thrombosis, and so on, it is important to understand the mechanical behavior of the stenting [9]. There have been some FEM analyses simulating the self-expanding stent placement into stenosed artery [10,11].…”

Section: Introductionmentioning

confidence: 99%

Deformation Analysis of Self-Expanding Stent Considering Plaque and a New Expanding Mechanism

Sasaki

Tomooka

Takeda

et al. 2018

EPI-IJE

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In this research, effects of material properties of stent materials, such as nitinol and ferrous alloy, on a self-expanding stent are studied by the stent deployment simulations using finite element method (FEM). Stent, vessel, and plaque are modeled by using AutoCAD. The model is imported to a finite element analysis software Ansys 15.0 and the deployment analysis of the stent is carried out. In addition, two methods of the unsheathing of the self-expanding stent are studied: (1) a conventional method where a stent comes out from one end of the sheath and (2) a new method in which a stent comes out from the center of the sheath. Also, both the area stenosis ratio and Dog-Boning are discussed referring the simulations conducted in the paper.

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“…To date few finite element analyses (FEA) of Nitinol stent implant simulations are available and most of them consider straight simplified anatomy and neglect the actual deployment process; only recently some study has been proposed to accomplish more realistic simulation of a e-mail: michele.conti@unipv.it peripheral stenting [9]- [10]. Consequently there is still a need for more realistic simulations taking the different stages of the Nitinol stent design process and the insertion in the target anatomy into account.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of Nitinol p eripheral stents: from laser-cutting to deployment in a patient specific anatomy

Conti

Auricchio

Beule

et al. 2009

ESOMAT 2009 - 8th European Symposium on Martensitic Transformations

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Abstract.The current clinical trend is to use percutaneous techniques, exploiting Nitinol self-expanding stents, to treat peripheral occluded vessels such as carotid or superficial femoral arteries. Although this class of stents addresses the biomechanical requirements (i.e. flexibility, kink resistance, etc.), it has been observed that many of these stents implanted in peripheral vessels are fractured. Numerical simulations have shown to be very useful in the investigation and optimization of stents and also to provide novel insights into fatigue/fracture mechanics. To date most finite element based stent simulations are performed in a straight simplified anatomy and neglect the actual deployment process; consequently there is a need for more realistic simulations taking into account the different stages of the stent design process and the insertion in the target anatomy into account. This study proposes a virtual framework to analyze numerically Nitinol stents from the laser-cutting stage to the deployment in a (patient specific) tortuous anatomy.

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Delivery and release of nitinol stent in carotid artery and their interactions: A finite element analysis

Cited by 107 publications

References 20 publications

Deployment of self-expandable stents in aneurysmatic cerebral vessels: comparison of different computational approaches for interventional planning

Deployment of self-expandable stents in aneurysmatic cerebral vessels: comparison of different computational approaches for interventional planning

Deformation Analysis of Self-Expanding Stent Considering Plaque and a New Expanding Mechanism

Numerical simulation of Nitinol p eripheral stents: from laser-cutting to deployment in a patient specific anatomy

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