Methods for securing a transcatheter valve to a bioprosthetic cardiac structure
AssigneeEdwards Lifesciences Corporation
InventorLouis A. Campbell
Life of this patent
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Abstract
A spacer for creating a docking station for a transcatheter heart valve is provided. The spacer changes an effective diameter and/or a shape of an implanted bioprosthetic structure such as a bioprosthetic heart valve or annuloplasty ring, providing a supporting structure into which the transcatheter valve expands without over expanding. The spacer may be deployed through an interventional technique either through transseptal access, transfemoral access, or transapical access and is typically deployed at least in part on an inflow portion of the implanted bioprosthetic structure.
Claims21
A method of securing a transcatheter heart valve within an annuloplasty ring that is D-shaped, the annuloplasty ring defining a D-shaped inner space and a central flow axis defining an upstream direction and a downstream direction, the downstream direction corresponding to the direction of blood flow from an upstream portion through a downstream portion of the annuloplasty ring, the method comprising steps of:
- providing a collapsible spacer ring having an inner shaft adapted to receive the transcatheter heart valve, the spacer ring being oriented in the upstream and downstream directions when the spacer ring is implanted within the annuloplasty ring, the spacer ring having a D-shaped outer periphery when expanded while the inner shaft is cylindrical;
- collapsing the spacer ring to a reduced diameter;
- coupling the reduced diameter spacer ring to a distal end portion of an elongate catheter;
- advancing the elongate catheter through a patient's vasculature and delivering the spacer ring into position within the D-shaped inner space of the annuloplasty ring;
- expanding the spacer ring within the D-shaped inner space of the annuloplasty ring such that the D-shaped outer periphery conforms to the D-shaped inner space, the spacer ring inner shaft sized to provide a cylindrical engagement surface for securing the transcatheter heart valve therein;
- and
- expanding the transcatheter heart valve within the annuloplasty ring, the transcatheter heart valve securing to the engagement surface of the inner shaft of the spacer ring.
A method of securing a transcatheter heart valve within a bioprosthetic heart valve with leaflets, the bioprosthetic heart valve having an inner space with an inside diameter and a central flow axis defining an upstream direction and a downstream direction, the downstream direction corresponding to the direction of blood flow from an upstream portion through a downstream portion of the bioprosthetic heart valve, the method comprising steps of:
- providing a collapsible spacer ring having an inner shaft adapted to receive the transcatheter heart valve, the spacer ring being oriented in the upstream and downstream directions when the spacer ring is implanted within the bioprosthetic heart valve, the spacer ring having an expandable downstream spacer flange and an expandable upstream spacer flange;
- collapsing the spacer ring to a reduced diameter;
- coupling the reduced diameter spacer ring to a distal end portion of an elongate catheter;
- advancing the elongate catheter through a patient's vasculature and delivering the spacer ring into position within the inner space of the bioprosthetic heart valve such that a downstream end of the spacer ring is positioned upstream from the leaflets of the bioprosthetic heart valve;
- pushing at least the upstream spacer flange out of the catheter so that the upstream spacer flange expands, wherein an outside dimension of the upstream spacer flange is greater than the inside diameter of an upstream end of the inner space of the bioprosthetic heart valve;
- displacing the catheter and the spacer ring in the downstream direction such that the upstream spacer flange contacts an upstream end surface of the bioprosthetic heart valve;
- expanding the downstream spacer flange of the spacer ring within the inner space of the bioprosthetic heart valve with the downstream spacer flange positioned upstream from the leaflets of the bioprosthetic heart valve, the spacer ring inner shaft sized to provide an engagement surface for securing the transcatheter heart valve therein;
- and
- expanding the transcatheter heart valve within the bioprosthetic heart valve, the transcatheter heart valve securing to the engagement surface of the inner shaft of the spacer ring.
Dependencies are inferred from the claim text.