619 血液循環系の人工臓器に関する開発と性能評価

概要

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A stentless valvular bioprosthetsis using a porcine aortic root has been shown to yield high performance in terms of durability, hydrodynamic characteristics and biocompatibility. The purpose of this study is to show the effect of the difference in methods of implanting the bioprosthesis at the aortic position on the hydrodynamic characteristics of the bioprosthesis. Subcoronary and Full-root techniques, that are mainly used for implanting the bioprosthesis into the aorta, were simulated under conditions in which the degree of elasticity around the bioprosthesis at the aortic root position was varied in a mock circulatory system. As a result, the forward flow at the bioprosthesis in the case of the Subcoronary was 11% greater than that of the Full-root. The variation in the elasticity around the bioprosthesis was suggested to influence the hydrodynamic characteristics.
2003-03-13