Multi-component designs for heart valve retrieval device, sealing structures and stent assembly
Inventors
Assignees
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Publication Number
US-11759318-B2
Publication Date
2023-09-19
Expiration Date
Abstract
This invention relates to the design and function of a device which allows for retrieval of a previously implanted valve prosthesis from a beating heart without extracorporeal circulation using a transcatheter retrieval system, including a guide component to facilitate the compression of the valve and retraction into a retrieval catheter, as well as an improved prosthetic transcatheter heart valve having one or more of: a series of radially extending tines having a loop terminus to improve sealing a deployed prosthetic mitral valve against hemodynamic leaking, a pre-compressible stent-in-stent design, or an articulating cuff attached to a covered stent-valve and a commissural sealing skirt structure attached to the underside of the articulating cuff.
Core Innovation
The invention relates to a prosthetic mitral valve comprising a preconfigured stent-in-stent design. The design includes an outer stent having an atrial end and a ventricular end, and an inner stent formed separately from and coupled to the outer stent, with the inner stent disposed at least partially within the outer stent to define an area between the outer stent and the inner stent.
A leaflet apparatus is disposed within the inner stent and is configured to allow blood to flow in an antegrade direction from the atrial end toward the ventricular end. A collar is coupled to the inflow end of the inner stent and the atrial end of the outer stent.
When the prosthetic mitral valve is implanted in a native mitral valve annulus, the area between the outer stent and the inner stent is configured to be filled with blood. In an expanded condition, a maximum diameter of the outer stent is located at the atrial end and a minimum diameter of the outer stent is located at the ventricular end.
Claims Coverage
The independent claim is directed to a prosthetic mitral valve including a preconfigured stent-in-stent design with an outer stent, an inner stent, a leaflet apparatus for antegrade flow, and a collar coupling the inflow end of the inner stent and the atrial end of the outer stent, with the inter-stent area configured to be filled with blood. It further specifies the outer-stent diameter relationship across atrial and ventricular ends in the expanded condition.
Preconfigured stent-in-stent mitral prosthesis with inter-stent blood-filled area
A prosthetic mitral valve having a preconfigured stent-in-stent design including an outer stent with an atrial end and a ventricular end; an inner stent formed separately from and coupled to the outer stent and disposed at least partially within the outer stent so that an area is defined between the outer stent and the inner stent; and the area between the outer stent and the inner stent is configured to be filled with blood when implanted in a native mitral valve annulus.
Leaflet apparatus for antegrade mitral blood flow
A leaflet apparatus disposed within the inner stent configured to allow blood to flow in an antegrade direction from the atrial end toward the ventricular end.
Collar coupling the inflow end of the inner stent to the atrial end of the outer stent
A collar coupled to the inflow end of the inner stent and the atrial end of the outer stent.
Outer stent diameter profile in expanded condition
In an expanded condition of the prosthetic mitral valve, a maximum diameter of the outer stent is located at the atrial end and a minimum diameter of the outer stent is located at the ventricular end.
Overall, the claim coverage centers on a prosthetic mitral valve with a preconfigured stent-in-stent structure that defines an inter-stent area configured to be filled with blood, a leaflet apparatus enabling antegrade flow, and a collar coupling the inner inflow end to the atrial end of the outer stent. The outer stent has a specified maximum-to-minimum diameter relationship across atrial versus ventricular ends in the expanded condition.
Stated Advantages
Reduce perivalvular and commissural leaking.
Documented Applications
Prosthetic mitral valve implantation in a native mitral valve annulus.
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