Numerical insights into the determinants of stent performance for the management of aneurysm with a visceral vessel attached

• Autorzy: Li Zhongyou , Chen Chong , Chen Yu , Wang Zhenze , Jiang Wentao , Tian Xiaobao

Identyfikatory

DOI

10.37190/ABB-01748-2020-03

• Języki publikacji: EN

Abstrakty

EN

Purpose: As the factors affecting the efficacy of the bare-metal stent in the treatment of aneurysm with a visceral vessel attached were not fully understood, we aimed to discuss the effects of different characteristics of the stent on the hemodynamics and flexibility in the treatment of the aneurysm. Methods: Single-layer (with different strut widths) and multi-layer (with a different number of struts) stent models divided into three porosity groups, with porosities of 72.3, 60.5, and 52.4%, were modeled for a comparison of their hemodynamic isolation and flexibility performance via computational fluid dynamics and finite element methods. Results: The velocity and timeaveraged wall shear stress decreased more noticeably with multi-layer stent interventions. A higher oscillatory shear index and relative residence time occurred at the aneurysmal sac wall after multi-layer stents were employed. Time-averaged wall shear stress on the aneurysmal wall decreased with an increase in the number of struts or a decrease in pore size, but oscillatory shear index and relative residence time increased as the number of struts increased or the pore size decreased. Besides, all stents affect the branch patency slightly. In the bending test, when the porosity exceeded 60.5%, multi-layer stents were more flexible. Conclusion: The number of struts or pore size of stent dominated the isolation in the management of the aneurysm and affected the flexibility significantly when the porosity was below 60.5%. These findings may contribute to the special design of the stent in the treatment of such types of aneurysms.

Słowa kluczowe

EN

aneurysm; stent; hemodynamics; flexibility

PL

tętniak; stent; hemodynamika; elastyczność

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2021
• Tom: Vol. 23, no. 2
• Strony: 41--53
• Opis fizyczny: Bibliogr. 38 poz., rys.

Twórcy

autor

Li Zhongyou

• Department of Applied Mechanics, Sichuan University, Chengdu, China

autor

Chen Chong

• Department of Applied Mechanics, Sichuan University, Chengdu, China

autor

Chen Yu

• Department of Applied Mechanics, Sichuan University, Chengdu, China

autor

Wang Zhenze

• Key Laboratory of Rehabilitation Aids Technology and System of the Ministry of Civil Affairs and Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age Disability, National Research Center for Rehabilitation Technical Aids, Beijing, China

autor

Jiang Wentao

• Department of Applied Mechanics, Sichuan University, Chengdu, China

autor

Tian Xiaobao

• Department of Applied Mechanics, Sichuan University, Chengdu, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).