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Heart valve prosthesis with rotatable cuff

  • US 6,358,278 B1
  • Filed: 09/24/1999
  • Issued: 03/19/2002
  • Est. Priority Date: 09/24/1999
  • Status: Expired due to Term
First Claim
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1. A prosthetic heart valve, comprising:

  • a valve body consisting of an orifice ring and an occluder;

    the orifice ring adapted to carry blood therethrough when an occluder is in its open position;

    an annular recess formed in an outer surface of the orifice ring which defines first and second axially spaced walls in the outer surface of the orifice ring;

    a compressible sewing cuff adapted to be coupled to a native tissue annulus of a heart, the cuff including an inner annular cuff portion adapted to conform to the first and second recess walls in the orifice ring; and

    a stiff cuff retaining ring adapted to extend around the inner annular cuff portion such that the inner annular cuff portion is positioned between the cuff retaining ring and the annular recess, the cuff retaining ring further adapted to exert a substantially axial force directed in an axial direction through the cuff and against the first and second axially spaced walls of the annular recess, said axial force being 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 sewing cuff relative to the valve body is developed substantially due to friction between the first and second recess walls and the inner annular cuff portion.

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