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Updated: Jul 10, 2025
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Optical Coherence Tomography Based Biomechanical Fluid-Structure Interaction Analysis of Coronary Atherosclerosis Progression
Published on: January 15, 2022
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Three-dimensional fluid-structure interaction simulation of the Wheatley aortic valve.
Hugo L Oliveira1, Gustavo C Buscaglia1, Rodrigo R Paz2,3
1Instituto de Ciências Matemáticas e de Computação-ICMC, Universidade de São Paulo-Campus de São Carlos, Avenida Trabalhador São-Carlense, São Carlos, Brazil.
International Journal for Numerical Methods in Biomedical Engineering
|November 27, 2023
Summary
This study introduces the Wheatley aortic valve (WAV), an innovative prosthetic heart valve design. Numerical modeling of the WAV demonstrates its mechanical behavior and potential failure modes, aiding future development for valvular heart disease treatment.
Area of Science:
- Biomedical Engineering
- Cardiovascular Research
- Computational Fluid Dynamics
Background:
- Valvular heart diseases are a significant global health burden, necessitating effective prosthetic valve replacements.
- Current prosthetic valves offer either durability or flexibility, but not both.
- The Wheatley aortic valve (WAV) is an innovative design aiming to combine the benefits of artificial and tissue valves.
Purpose of the Study:
- To develop and validate a numerical model for the Wheatley aortic valve (WAV).
- To analyze the mechanical behavior and fluid dynamics of the WAV.
- To investigate potential failure modes of the WAV under various operational conditions.
Main Methods:
- Implementation of a multi-physics numerical model using LS-DYNA software.
- Calibration and validation of the model against pulsatile flow experimental data.
- Sensitivity analysis of model and design parameters, including contact, mesh size, leaflet height, and material constants.
Main Results:
- Detailed description of leaflet motion and fluid flow patterns within the WAV.
- Identification of potential failure modes, particularly related to inadequate leaflet height.
- Validation of the numerical model's accuracy in predicting WAV behavior.
Conclusions:
- The developed numerical model provides a robust tool for understanding WAV mechanics.
- The study highlights the importance of design parameters, such as leaflet height, for optimal valve function.
- This work lays the foundation for future assessments of WAV thrombogenicity under physiological conditions.
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