[Fluid solid interaction analysis of bioprosthetic heart valve]

Area of Science:

• Biomedical Engineering
• Computational Fluid Dynamics
• Medical Device Design

Background:

• Bioprosthetic heart valves are crucial for treating valvular heart disease.
• Accurate simulation of valve mechanics and blood flow is essential for device development.
• Existing models may not fully capture the complex fluid-solid interactions.

Purpose of the Study:

• To develop a numerical model of a bioprosthetic heart valve interacting with blood flow.
• To analyze the mechanical properties and performance of the valve during a cardiac cycle.
• To compare the simulation results with physiological measurements and identify areas for design optimization.

Main Methods:

• Construction of coupled numerical models for the bioprosthetic heart valve and blood.
• Application of the penalty function method for fluid-solid interaction analysis.
• Simulation of valve mechanics using ANSYS software during a cardiac cycle.

Main Results:

• Von Mises stress was observed to concentrate at the junction of the attachment and coaptation edges.
• The simulated open time of the bioprosthetic heart valve closely matched actual measurements.
• Peak blood velocity in the model fell within the physiological range.

Conclusions:

• The developed model provides a more realistic representation of bioprosthetic heart valve mechanical properties during a cardiac cycle compared to solid-only models.
• This simulation approach facilitates the design and optimization of bioprosthetic heart valves.
• The findings support the use of advanced numerical modeling for improving cardiovascular device performance.