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    HEART VALVE PROSTHESIS
    2.
    发明公开
    HEART VALVE PROSTHESIS 有权
    HERZKLAPPENPROTHESE

    公开(公告)号：EP1155666A1

    公开(公告)日：2001-11-21

    申请号：EP99968428.5

    申请日：1999-11-29

    申请人： Samkov, Alexandr Vasilievich ,  IOFIS, Naum Abramovich ,  AGAFONOV, Andrei Vasilievich

    发明人： Samkov, Alexandr Vasilievich ,  IOFIS, Naum Abramovich ,  AGAFONOV, Andrei Vasilievich

    IPC分类号： A61F2/24

    CPC分类号： A61F2/2403

    摘要： The present invention relates to medical techniques and can be used in heart surgery for the replacement of the damaged natural aortal and mitral human heart valves and also tricuspid and lung artery valves.
    A heart valve prosthesis comprises an annular body with a pair of flanges, and a closing element in the form of two or three flaps mounted by means of bearings into the body's recesses with freedom to be rotated. The body has a constant height on a greater portion of a ring circle, and ledges the number of which is equal to that of the flaps. The ledges are provided with flap rotation limiters. In the preferable embodiment, the ledges are W-shaped while their interior surface from the side of the direct flow of blood is inclined to the central axis of the body.
    The flaps have ascending and descending surfaces oriented to the direct and reverse flows of blood, respectively, a side edge and an edge for joining the other flap. The descending surface of a flap is flat and the ascending surface thereof is spherically concave. The flaps have the minimal thickness on an axis of symmetry at the joining edge. In the event when a closing element comprises three flaps, each of them has two joining edges obliquely converging toward the body's central axis. Also, the axes of rotation of the flaps will be arranged relative to each other at an angle of 60° thereby to form the sides of an equilateral triangle.
    For the valve with two flaps the flange facing the direct flow of blood is thickened. Recesses for bearings enter into the thickened flange, said recesses having a lateral cylindrical surface and a concave bottom.
    The recesses for bearings can be configured as a triad of blind holes being in communication, which is comprised of one central and two side holes. And the radius and depth of the central hole are greater than the radii and depths of the side holes.

    摘要翻译： 本发明涉及医学技术，并且可以用于心脏手术中用于替换受损的自然主动脉和二尖瓣人心脏瓣膜以及三尖瓣和肺动脉瓣。 心脏瓣膜假体包括具有一对凸缘的环形体，以及通过轴承将两个或三个翼片形式的闭合元件安装到身体的凹部中，自由旋转。 主体在环形圈的较大部分上具有恒定的高度，并且其数量等于襟翼的数量。 凸缘设有挡板旋转限位器。 在优选的实施例中，凸缘是W形的，而从血液直接流动侧的内表面相对于身体的中心轴线倾斜。 翼片具有分别朝向血液的直接和反向流动的上升和下降表面，侧边缘和用于接合另一个皮瓣的边缘。 翼片的下降表面是平坦的，其上升的表面是球形凹的。 翼片在接合边缘处的对称轴上具有最小的厚度。 在闭合元件包括三个翼片的情况下，它们中的每一个具有两个接合边缘，其倾斜地朝向主体的中心轴线会聚。 此外，翼片的旋转轴线将相对于彼此以60°的角度布置，从而形成等边三角形的侧面。 对于具有两个襟翼的阀门，面向血液直接流动的法兰变厚。 轴承的凹槽进入加厚的凸缘，所述凹槽具有侧向圆柱形表面和凹形底部。 用于轴承的凹槽可以被配置为连通的三通孔，其由一个中心和两个侧孔组成。 中心孔的半径和深度大于侧孔的半径和深度。