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Device for the in situ delivery of heart valves

  • US 8,353,953 B2
  • Filed: 05/13/2009
  • Issued: 01/15/2013
  • Est. Priority Date: 05/13/2009
  • Status: Active Grant
First Claim
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1. A device for delivering a cardiac valve prosthesis comprising an expandable, tissue, stented heart valve including an annular inflow portion, and annular outflow portion, and a plurality of anchoring arms, to an implantation site, the device comprising:

  • a distal valve holder portion defining a cavity adapted to receive and radially constrain the annular inflow portion, the annular outflow portion, and the anchoring arms of the valve prosthesis therein;

    a shaft coupled to the valve holder portion, the shaft including a tubular sleeve and a core disposed partially within the tubular sleeve, the core having a proximal portion and a distal portion and the core being adapted to move axially with respect to the sleeve;

    wherein the proximal portion includes an external sheath and a coil element disposed therein in order to provide flexibility to the proximal portion of the shaft, and the distal portion includes an external sheath, a braided tubular element disposed therein, and a pair of longitudinal formations constrained between the external sheath and the braided tubular element, the longitudinal formations extending partially along the shaft in the proximal portion and comprising a limited radial portion of the distal portion, and adapted to stiffen the distal portion of the shaft;

    a valve support disposed at or near a distal end of the shaft, the valve support including an annular recess adapted to mate with the outflow portion of the valve prosthesis;

    a deployment mechanism adapted to axially translate the valve support with respect to the distal valve holder, such that the valve prosthesis is selectively deployed at the implantation site; and

    a deflection mechanism coupled to shaft, the deflection mechanism adapted to selectively vary the spatial orientation of the valve holder portion with respect to the implantation site.

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