STENT-VALVES FOR VALVE REPLACEMENT AND ASSOCIATED METHODS AND SYSTEMS FOR SURGERY
Stent-valves (e.g., single-stent-valves and double-stent-valves), associated methods and systems for their delivery via minimally-invasive surgery, and guide-wire compatible closure devices for sealing access orifices are provided.
1 . A stent-valve delivery assembly for cardiac valve replacement, comprising:
a delivery device including a stent-holder and an outer sheath; and
a stent-valve including a valve component and a stent component housing the valve component, the stent component including at least two attachment elements matably attached to the stent-holder such that the stent-valve is held in position with respect to the delivery device by the stent-holder, wherein the stent-valve has a collapsed configuration for delivery within the outer sheath to an implantation site and a fully expanded configuration after implantation, wherein the stent-valve is configured to be partially expanded while maintaining attachment of the at least two attachment elements to the stent-holder;
wherein the at least two attachment elements are configured to detach from the stent-holder and cause the stent-valve to expand from the partially expanded configuration to a fully expanded configuration.
2 . The stent-valve delivery assembly of claim 1 , wherein the at least two attachment elements are matably attached to a complimentary structure of the stent-holder, such that the stent-valve is held in position with respect to the delivery device by the stent-holder.
3 . The stent-valve delivery assembly of claim 2 , wherein the stent-holder comprises a radial extending structure positioned towards a distal end of the delivery device.
4 . The stent-valve delivery assembly of claim 3 , wherein the complimentary structure comprises the radial extending structure, and wherein matably attached comprises removably attached to the radial extending structure.
5 . The stent-valve delivery assembly of claim 1 , wherein the stent component further comprises a lattice structure comprising closed cells configured to facilitate recapture of the stent-valve when partially expanded.
6 . The stent-valve delivery assembly of claim 1 , wherein the at least two attachment elements are interconnected by bracing elements in a circular configuration, each bracing element comprising a plurality of peaks between the at least two attachment elements.
7 . The stent-valve delivery assembly of claim 1 , wherein matably attached comprises removably attached to the stent-holder.
8 . The stent-valve delivery assembly of claim 1 , wherein when in a closed position, the outer sheath encompasses the stent-valve and constrains expansion of the stent-valve, wherein the outer sheath is configured for distal movement relative to the stent-holder in order to transition from the closed position, to a partially-open position, to an open position.
9 . The stent-valve delivery assembly of claim 1 , wherein the stent component includes a first section with an annular groove and a second section housing the valve component, wherein the annular groove is defined by an annular indentation of the stent component which correspondingly presents an indented interior surface of the stent component.
10 . The stent-valve delivery assembly of claim 9 , wherein when the stent-valve is in the fully expanded configuration, a diameter of the stent component in a region of the at least two attachment elements is smaller than a diameter of the second section of the stent component.
11 . The stent-valve delivery assembly of claim 9 , wherein the annular groove includes a diameter that is slightly larger than a diameter of the implantation site such that the stent-valve is secured in place by a friction fitting.
12 . The stent-valve delivery assembly of claim 11 , wherein the valve component extends down to the annular groove in the first section.
13 . The stent-valve delivery assembly of claim 12 , wherein the valve component is axially taller than the annular groove.
14 . The stent-valve delivery assembly of claim 1 , wherein the at least two attachment elements include three integral attachment elements.
15 . The stent-valve delivery assembly of claim 1 , wherein each attachment element has a geometrical opening.
16 . A stent-valve delivery assembly for cardiac valve replacement, comprising:
a delivery device including a stent-holder and an outer sheath; and
a stent-valve including a valve component and a self-expandable stent component housing the valve component, the stent component including at least two attachment elements with geometrical openings removably attached to the stent-holder such that the stent-valve is held in position with respect to the delivery device by the stent-holder, wherein the stent-valve has a collapsed configuration for delivery within the outer sheath to an implantation site and a fully expanded configuration after implantation, wherein the stent-valve is configured to be partially expanded while maintaining attachment of the at least two attachment elements to the stent-holder.
17 . The stent-valve delivery assembly of claim 16 , wherein the at least two attachment elements are interconnected by bracing elements in a circular configuration, each bracing element comprising a plurality of peaks between the at least two attachment elements.
18 . The stent-valve delivery assembly of claim 16 , wherein when in a closed position, the outer sheath encompasses the stent-valve and constrains expansion of the stent-valve, wherein the outer sheath is configured for distal movement relative to the stent-holder in order to transition from the closed position, to a partially-open position, to an open position.
19 . The stent-valve delivery assembly of claim 16 , wherein the stent component includes a first section with an annular groove and a second section housing the valve component, wherein the annular groove is defined by an annular indentation of the stent component which correspondingly presents an indented interior surface of the stent component.
20 . A stent-valve delivery assembly for cardiac valve replacement, comprising:
a delivery device including a stent-holder and an outer sheath; and
a stent-valve including a valve component and a self-expandable stent component housing the valve component, the stent component including at least two attachment elements removably attached to the stent-holder such that the stent-valve is held in position with respect to the delivery device by the stent-holder, wherein the stent-valve has a collapsed configuration for delivery within the outer sheath to an implantation site and a fully expanded configuration after implantation, wherein the stent-valve is configured to be partially expanded while maintaining attachment of the at least two attachment elements to the stent-holder.