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    • 5. 发明授权
    • Heart valve prosthesis with rotatable cuff
    • 具有可旋转袖口的心脏瓣膜假体
    • US06358278B1
    • 2002-03-19
    • US09406275
    • 1999-09-24
    • Avrom M. BrendzelWilliam R. KramlingerMichael J. GirardJonas A. Runquist
    • Avrom M. BrendzelWilliam R. KramlingerMichael J. GirardJonas A. Runquist
    • A61F224
    • A61F2/2409
    • A prosthetic heart valve includes an orifice ring adapted to carry blood therethrough. An annular recess is formed in an outer surface of the orifice ring and has first and second axially spaced walls. A sewing cuff is adapted to be coupled to a native tissue annulus of a heart and includes an inner annular cuff portion adapted to conform to the first and second recess walls in the orifice ring. A cuff retaining ring extends around the inner annular fabric portion such that the inner annular cuff portion is positioned between the cuff retaining ring and the annular recess. The cuff retaining ring is further adapted to exert a substantially axially directed force directed against the annular cuff portion and first and second axially spaced walls of the annular recess, which is substantially greater than a radial force directed substantially inwardly by the cuff retaining ring against an annulus of the recess located between the first and second walls, whereby a controllable torque to rotate the cuff relative to the orifice ring is developed substantially due to friction between the first and second recess walls cuff portion and the annular recess.
    • 假体心脏瓣膜包括适于携带血液的孔口环。 环形凹部形成在孔环的外表面中并具有第一和第二轴向隔开的壁。 缝合箍适于联接到心脏的天然组织环,并且包括适于与孔环中的第一和第二凹陷壁一致的内环形箍部分。 袖带保持环围绕内部环形织物部分延伸,使得内部环形箍部分位于袖带保持环和环形凹部之间。 套箍保持环还适于施加指向环形箍部分和环形凹部的第一和第二轴向隔开的壁的基本上轴向的力,其基本上大于由套箍保持环基本向内指向的径向力 位于第一和第二壁之间的凹部的环形空间,由此基本上由于第一和第二凹部壁箍部分和环形凹部之间的摩擦而使袖带相对于孔环旋转的可控转矩变大。