Abstract:
Transcatheter heart valve replacement is a procedure for the treatment of symptomatic heart valve disease. During this procedure, a bioprosthetic valve device is first crimped to a low profile in a catheter delivery system. The delivery system is then tracked through the native vasculature and the bioprosthetic valve is then deployed into a failing native valve where it regulates blood flow between the chambers of the heart. The bioprosthetic heart valve is typically comprised of a metallic frame structure to which a tissue valve subassembly is attached.
Modelling tools are widely used in all stages of the design and development of transcatheter heart valves at Medtronic. Modelling is used to accelerate concept assessment, for detailed design optimization, and in design verification activities prior to regulatory submission. In this presentation we aim to provide a brief overview of how modelling tools are used in product development at Medtronic. We will also share our experience from a recent collaboration with Dassault Systèmes to develop a method for simulating the full crimping of a heart valve device from its manufactured diameter down an insertable diameter. This analysis is very challenging, involving multiple nonlinear materials that are subjected to extreme deformations resulting in buckling deformation modes and multiple complex interactions. The learnings from this work have been invaluable to internal development activities at Medtronic.
Presenters:
David Martin Principal Engineer - Medtronic
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David Nolan Principal Engineer - Medtronic
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