Multiobjective design optimization of stent geometry with wall deformation for triangular and rectangular struts.
The stent geometrical design (e.g., inter-strut gap, length, and strut cross-section) is responsible for stent-vessel contact problems and changes in the blood flow. These changes are crucial for causing some intravascular abnormalities such as vessel wall injury and restenosis. Therefore, structura...
| Publicado en: | Medical & Biological Engineering & Computing Vol. 57; no. 1; pp. 15 - 27 |
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| Autores principales: | , , , , |
| Formato: | equations & formulas pictorial research tables/charts Journal Article |
| Publicado: |
Springer Nature
Jan2019
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=133800681&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 133800681 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01400118 PO0 jtl: Medical & Biological Engineering & Computing issn: 01400118 maglogo: N pubinfo: dt: Jan2019 vid: 57 iid: 1 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 133800681 133800681 NLM29967933 133800681 10.1007/s11517-018-1864-6 NLM29967933 133800681 ppf: 15 ppct: 12 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Multiobjective design optimization of stent geometry with wall deformation for triangular and rectangular struts. aug: au: Putra, Narendra Kurnia Palar, Pramudita Satria Anzai, Hitomi Shimoyama, Koji Ohta, Makoto affil: Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University, Aramaki-Aza Aoba 6-6-4, Aoba-ku, 980-8579, Sendai, Miyagi, Japan sug: subj: Stents Prosthesis Design Stress, Mechanical Hemodynamics Computer Simulation Models, Biological Scales Funding Source ab: The stent geometrical design (e.g., inter-strut gap, length, and strut cross-section) is responsible for stent-vessel contact problems and changes in the blood flow. These changes are crucial for causing some intravascular abnormalities such as vessel wall injury and restenosis. Therefore, structural optimization of stent design is necessary to find the optimal stent geometry design. In this study, we performed a multiobjective stent optimization for minimization of average stress and low wall shear stress ratio while considering the wall deformation in 3D flow simulations of triangular and rectangular struts. Surrogate-based optimization with Kriging method and expected hypervolume improvement (EHVI) are performed to construct the surrogate model map and find the best configuration of inter-strut gap (G) and side length (SL). In light of the results, G-SL configurations of 2.81-0.39 and 3.00-0.43 mm are suggested as the best configuration for rectangular and triangular struts, respectively. Moreover, considering the surrogate model and flow pattern conditions, we concluded that triangular struts work better to improve the intravascular hemodynamics. ᅟ Graphical abstract. pubtype: Academic Journal doctype: equations & formulas pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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