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Peer-reviewedCC BY 4.0Annals of Vascular Diseases

Mechanical and Hemodynamic Effects of Balloon-Expandable and Self-Expanding Stents in a Saccular Abdominal Aortic Aneurysm Model: Fluid–Structure Interaction Analyses

  • Masanori Murakami1
  • Fei Jiang2
  • Tatsuo Yamashita2
  • Shinsuke Mochizuki2
  1. 1Department of Cardiovascular Surgery, National Hospital Organization Kanmon Medical Center, Shimonoseki, Yamaguchi, Japan
  2. 2Department of Mechanical Engineering, Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Ube, Yamaguchi, Japan
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Abstract

Objectives: The aim of this study was to compare the effects of balloon-expandable and self-expanding stents on vessel wall mechanics and hemodynamics in a patient-specific saccular abdominal aortic aneurysm model.

Methods: A patient-specific aneurysm model was constructed using computed tomography images, and balloon-expandable and self-expanding stent models were created. Aortic wall stress was evaluated by contact analysis. Fluid–structure interaction analyses were performed at 5 representative phases selected from the cardiac cycle. Mean intra-aneurysmal flow velocity, wall shear stress (WSS), pressure loss, and energy loss were compared.

Results: The balloon-expandable stent produced greater localized aortic wall stress than the self-expanding stent, whereas wall stress was more uniformly distributed with the self-expanding stent. Both stents reduced the mean intra-aneurysmal flow velocity, WSS, pressure loss, and energy loss compared with the no-stent model. However, greater reductions in WSS, pressure loss, and energy loss were noted with the balloon-expandable stent than with the self-expanding stent.

Conclusions: Balloon-expandable and self-expanding stents exhibited different effects on vessel wall mechanics and hemodynamics. The findings indicate the importance of evaluating both hemodynamic and mechanical effects when assessing stent–vessel interactions.

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Cite

BibTeXRIS
BibTeX
@article{murakami2026mechanical,
  title = {{Mechanical and Hemodynamic Effects of Balloon-Expandable and Self-Expanding Stents in a Saccular Abdominal Aortic Aneurysm Model: Fluid–Structure Interaction Analyses}},
  author = {Masanori Murakami and Fei Jiang and Tatsuo Yamashita and Shinsuke Mochizuki},
  journal = {Annals of Vascular Diseases},
  year = {2026},
  month = oct,
  doi = {10.3400/avd.oa.26-00052},
  url = {https://doi.org/10.3400/avd.oa.26-00052},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Mechanical and Hemodynamic Effects of Balloon-Expandable and Self-Expanding Stents in a Saccular Abdominal Aortic Aneurysm Model: Fluid–Structure Interaction Analyses
AU  - Masanori Murakami
AU  - Fei Jiang
AU  - Tatsuo Yamashita
AU  - Shinsuke Mochizuki
PY  - 2026
DA  - 2026/10/23
JO  - Annals of Vascular Diseases
DO  - 10.3400/avd.oa.26-00052
UR  - https://doi.org/10.3400/avd.oa.26-00052
AB  - Objectives: The aim of this study was to compare the effects of balloon-expandable and self-expanding stents on vessel wall mechanics and hemodynamics in a patient-specific saccular abdominal aortic aneurysm model.  Methods: A patient-specific aneurysm model was constructed using computed tomography images, and balloon-expandable and self-expanding stent models were created. Aortic wall stress was evaluated by contact analysis. Fluid–structure interaction analyses were performed at 5 representative phases selected from the cardiac cycle. Mean intra-aneurysmal flow velocity, wall shear stress (WSS), pressure loss, and energy loss were compared.  Results: The balloon-expandable stent produced greater localized aortic wall stress than the self-expanding stent, whereas wall stress was more uniformly distributed with the self-expanding stent. Both stents reduced the mean intra-aneurysmal flow velocity, WSS, pressure loss, and energy loss compared with the no-stent model. However, greater reductions in WSS, pressure loss, and energy loss were noted with the balloon-expandable stent than with the self-expanding stent.  Conclusions: Balloon-expandable and self-expanding stents exhibited different effects on vessel wall mechanics and hemodynamics. The findings indicate the importance of evaluating both hemodynamic and mechanical effects when assessing stent–vessel interactions.
SN  - 1881-641X
SN  - 1881-6428
ER  -