Devices, systems, and methods for supplementing, repairing, or replacing a native heart valve leaflet
View Patent ↗An implant for supplementing, repairing, or replacing a native heart valve leaflet or leaflets provides a scaffold, which defines a pseudo-annulus. The implant further has at least two struts in generally oppositely spaced apart positions on the scaffold. The scaffold can be placed in an elastically loaded condition in a heart with the struts engaging tissue at or near the leaflet commissures of a heart valve annulus, to reshape the annulus for leaflet coaptation. The implant further provides a neoleaflet element coupled to the scaffold within pseudo-annulus, to provide a one-way valve function.
1. A method comprising the steps of
providing an implant comprising
a scaffold, at least a portion of the scaffold defining a pseudo-annulus, the scaffold comprising a normal, unloaded condition and an elastically loaded condition,
at least two struts, the struts having a connecting member and a tab segment, wherein the struts are coupled to the scaffold by the connecting members and are positioned in generally oppositely spaced apart positions,
a first neoleaflet element coupled to the scaffold, the neoleaflet element comprising a first material spanning at least a first portion of the pseudo annulus,
introducing the implant into a heart, wherein the heart includes a valve having a native valve annulus with an upstream and downstream side, the valve further having at least one native leaflet joined at leaflet commissures to tissue that surrounds the native valve annulus,
positioning the pseudo-annulus defined by the scaffold adjacent to the upstream side of the native valve annulus,
positioning the neoleaflet element in an at least partially overlapping relationship with at least one of the at least one native leaflets,
placing the strut tab segments into engagement with the tissue at or near the native leaflet commissures, and
allowing external compression forces to place the elastic scaffold into the elastically loaded condition,
whereby force exerted on the tissue by the struts reshapes the native valve annulus.
2. A method according to claim 1
wherein the introducing comprises using an open heart surgical procedure.
3. A method according to claim 1
wherein the introducing comprises using a surgical procedure in which the implant is carried within a catheter.
4. A method according to claim 1
wherein the introducing comprises using an intravascular surgical procedure.
5. A method according to claim 1
wherein the provided implant further comprises a second neoleaflet element, the second neoleaflet element comprising a second material spanning at least a second portion of the pseudo-annulus and positioned in an at least partially overlapping relationship with the first neoleaflet element, whereby the pseudo-annulus defined by the scaffold is substantially closed by the first and second neoleaflets when the scaffold is in one of the unloaded condition and the loaded condition.
6. A method according to claim 5
wherein the introducing comprises using an open heart surgical procedure.
7. A method according to claim 5
wherein the introducing comprises using a surgical procedure in which the implant is carried within a catheter.
8. A method according to claim 5
wherein the introducing comprises using an intravascular surgical procedure.
9. A method according to claim 1
wherein the first neoleaflet element of the provided implant is formed integrally with the scaffold.
10. A method according to claim 1
wherein, after the placing step, the narrow connecting members of each strut extend at least partially through the native valve annulus.
11. A method according to claim 1
wherein the struts have a generally t-shaped configuration.
12. A method according to claim 1 further comprising the step of:
providing a one-way valve function with the neoleaflet element.