Surgical stent planning: simulation parameter study for models based on DICOM standards

Scherer, S.; Treichel, Thomas; Ritter, Nils; Triebel, G.; Drossel, Welf‐Guntram; Burgert, Oliver

doi:10.1007/s11548-010-0511-y

Cited by 13 publications

(7 citation statements)

References 26 publications

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“…The elastic recoil of the stent reduced its radial strength by 18.75%. However, smaller radial strength might lead to the migration of the stent [28]. In contrast, the recoil relieved the peak arterial stresses by 38.51% as well as the percentage area of high stress (>80 kPa) by 10.14% (Fig.…”

Section: Discussionmentioning

confidence: 94%

On the Importance of Modeling Stent Procedure for Predicting Arterial Mechanics

Zhao

Gu²,

Froemming³

2012

Journal of Biomechanical Engineering

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The stent-artery interactions have been increasingly studied using the finite element method for better understanding of the biomechanical environment changes on the artery and its implications. However, the deployment of balloon-expandable stents was generally simplified without considering the balloon-stent interactions, the initial crimping process of the stent, its overexpansion routinely used in the clinical practice, or its recoil process. In this work, the stenting procedure was mimicked by incorporating all the above-mentioned simplifications. The impact of various simplifications on the stentinduced arterial stresses was systematically investigated. The plastic strain history of stent and its resulted geometrical variations, as well as arterial mechanics were quantified and compared. Results showed the model without considering the stent crimping process underestimating the minimum stent diameter by 17.2%, and overestimating the maximum radial recoil by 144%. It was also suggested that overexpansion resulted in a larger stent diameter, but a greater radial recoil ratio and larger intimal area with high stress were also obtained along with the increase in degree of overexpansion.

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Section: Discussionmentioning

confidence: 94%

On the Importance of Modeling Stent Procedure for Predicting Arterial Mechanics

Zhao

Gu²,

Froemming³

2012

Journal of Biomechanical Engineering

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“…Other applications of finite element simulations have been proposed, for the placement of a stent in the context of EVAR procedures 22 , or in the peripheral vessels [23][24][25][26][27] .…”

Section: Discussionmentioning

confidence: 99%

Prediction of deformations during endovascular aortic aneurysm repair using finite element simulation

Kaladji

Dumenil

Castro

et al. 2013

Computerized Medical Imaging and Graphics

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During endovascular aortic aneurysm repair (EVAR), the introduction of medical devices deforms the arteries. The aim of the present study was to assess the feasibility of finite element simulation to predict arterial deformations during EVAR. The aortoiliac structure was extracted from the preoperative CT angiography of fourteen patients who underwent EVAR.The simulation consists of modeling the deformation induced by the stiff guidewire used during EVAR. The results of the simulation were projected onto the intraoperative images, using a 3D/2D registration. The mean distance between the real and simulated guidewire was 2.3 ± 1.1 mm. Our results demonstrate that finite element simulation is feasible and appears to be reproducible in modeling device/tissue interactions and quantifying anatomic deformations during EVAR.

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“…While simulation-based analysis on the interaction of the wire stent (for the treatment of stenosis) and the vessel wall had been carried out by several research teams [6][7][8][9][10], only two relevant papers on the numerical description of the mechanical behavior of a stent graft with Nitinol rings have been detected so far [11,12]. By means of a simplified model, Kleinstreuer et al analyzed the effects of different material combinations of the stent graft regarding fatigue resistance, radial forces and flexibility.…”

Section: Introductionmentioning

confidence: 99%

“…Blood pressure, consistency of intima and the existence of plaque were found to be influential parameters for the representation of the interaction between stent graft and vessel. Furthermore, the choice of the respective material models was presented [12]. The fixing force of the stent graft, as well as the contact pressure of the stent ring towards vessel wall and plaque have also been detected as helpful output variables for the optimization of implant selection.…”

Section: Introductionmentioning

confidence: 99%