Mechanical heart valve assembly with super-elastic lock wire

Details Mechanical heart valve assembly with super-elastic lock wire Mechanical heart valve assembly with super-elastic lock wire

A - Human Necessities

61

F

A61F 2/24 (2006.01)

Patent

CA 2345643

A mechanical heart valve assembly includes an orifice (2) coupled with a stiffening ring ( 12) and sewing cuff (20) by a lock wire (26). The lock wire (26) is made from a super-elastic material, e.g., a nickel-titanium alloy, and pre-formed into a "C" shape. The lock wire (26) is inserted between the orifice (2) and stiffening ring (12) by piercing the sewing cuff (20) that surrounds the ring (12), and passing the lock wire (26) into a window (22) in the stiffening ring (12) and into the aligned lock wire grooves (6, 24) on the orifice and stiffening ring. Once seated in the lock wire grooves, the lock wire (26) retains its "C" shape, providing a secure coupling between the orifice (2) and stiffening ring (12).

L'invention concerne un ensemble valvule cardiaque mécanique dont l'orifice (2) est couplé à un anneau (12) de renfort et à une bague (20) de piquage par un fil (26) de blocage. Le fil (26) de blocage est fabriqué dans un matériau super-élastique, par exemple, un alliage nickel-titane, et préformé en "C". On insère le fil (26) de blocage entre l'orifice (2) et l'anneau (12) de renfort en perforant la bague (20) de piquage entourant l'anneau (12), et en passant le fil (26) de blocage dans une fenêtre (22) ménagée dans l'anneau (12) de renfort et dans les rainures (6, 24) pour fil de blocage alignées situées sur l'orifice et sur l'anneau de renfort. Une fois logé dans les rainures, le fil (26) de blocage garde sa forme de "C", assurant ainsi un couplage sûr entre l'orifice (2) et l'anneau (12) de renfort.

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