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TAVI cell geometry optimization techniques

Keywords:

K.U. Klyshnikov – Junior Research Scientist, Institute for Complex Issues of Cardiovascular Diseases under the Siberian Branch of the Russian Academy of Medical Sciences, Kemerovo, Russian Federation
E.A. Ovcharenko – Junior Research Scientist, Institute for Complex Issues of Cardiovascular Diseases under the Siberian Branch of the Russian Academy of Medical Sciences, Kemerovo, Russian Federation
D.V. Nyshtaev – Engineer, ООО «TESIS» ( Limited Liability Company), Moscow, Russian Federation


One way to improve the reliability and durability of the transcatheter aortic valve prosthesis is to optimize the geometry of its cell. This paper presents the analysis of the impact of various optimization methods and their combinations on the stress-strain state of the diamond cell frame of transcatheter valve via finite element analysis. According to the results of the study the most pronounced effect of the following techniques had: the change in connector length (reduction of the maximum von Mises stress at 13.26 % compared to baseline values), the change in the radius of curvature of the cell (reducing stress at 2.25 % ), the change in width of the connector (4.4 %) . At the same time, the combination of different optimization techniques demonstrated more pronounced synergistic effect of reducing the stress at 25.26 %, the strain - at 10.4%. All investigated optimization techniques have shown a significant reduction of the construction radial forces.
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