Comparison and analysis of modeling heart valve bracket based on magnetic resonance imaging

Cui Yiwen; Yuan Quan; Liu Jikai

doi:10.12307/2024.376

Abstract：BACKGROUND:Currently,artificial valves used in heart valve operations include biological valves and mechanical valves.The design and processing of the biological valve bracket determine the shape of the biological valves,which in turn determines their service life. OBJECTIVE:Various lobe and bracket models were created based on the spatial geometric equation.Through a comparison of the deformation and stress distribution of various lobe and bracket models,a more rational bracket model was derived.Subsequently,3D printing technology was utilized to produce a solid model. METHODS:According to the geometric and mathematical models of the heart valve leaf and valve bracket,parabolic and ellipsoidal heart valve bracket models were created.Three-dimensional modeling was used to design the heart valve bracket.Two-way fluid-structure coupling analysis was conducted to analyze the force and deformation of the valve bracket in the blood flow field.An appropriate printing method and materials were selected to achieve 3D printing of the heart valve bracket. RESULTS AND CONCLUSION:The distribution rules of deformation,maximum principal stress,and maximum shear stress of the parabolic bracket and ellipsoidal bracket are the same.The deformation and stress of the ellipsoidal bracket were greater than those of the parabolic bracket.The distribution law of maximum principal stress and maximum shear stress was mainly concentrated in the joint part of the lobe and bracket.The total deformation,maximum principal stress,and maximum shear stress of the bracket decrease with the increase of the bracket diameter.