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A SEMI-STENTED AND CHORDED MITRAL VALVE PROSTHESIS: DESIGN AND METHOD OF CHORDAL SETTING AND IN VITRO TESTING

机译:半支撑和弦尖瓣假体:曲线设定的设计和方法和体外测试

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Mitral subvalvular apparatus plays an important role in mitral and ventricular dynamics by preserving annuloventricular continuity, known to be fundamental for ventricular function. While some proposed mitral valve prostheses designs do attempt to account for this relationship by using papillary flaps, they are not adjustable and do not mimic the native saddle shaped mitral annulus. Unfortunately, these designs are not versatile as their papillary flap lengths cannot be altered and the prostheses are unsuitable for percutaneous implantation. We address these issues through the design of a novel semi-stented and chorded mitral valve that better mimics the native mitral annulus, leaflets and chordae function and can be made from off-the-shelf biomaterials with the potential to be implanted percutaneously. We also propose a novel and reliable method to set the chordal lengths individually. Finally, we demonstrate the hydrodynamic performance of the valve, showing that it meets the minimum performance requirements stipulated by the international standard ISO 5840-3:2013.
机译:二尖瓣亚瓣膜通过保留含有载窝心腔内连续性的二尖瓣和心室动力学起着重要作用,已知是心室功能的基础。虽然一些提出的二尖瓣假体设计确实试图通过使用乳头状翼片来解释这种关系,但它们不可调节,并且不会模仿本地鞍形二尖瓣环。不幸的是,这些设计不通过通用,因为它们的乳头状翼片长度不能改变,并且假体不适合经皮植入。我们通过设计一种新型半支架和和弦二尖瓣来解决这些问题,可更好地模仿天然二尖瓣环,传单和Chordae功能,并且可以通过剥离生物材料制成,具有经皮的潜力。我们还提出了一种新颖可靠的方法来单独设定十字长度。最后,我们展示了阀门的流体动力学性能,表明它符合国际标准ISO 5840-3:2013规定的最低性能要求。

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