Percutaneous shunt devices and related methods
The disclosure provides various embodiments of prostheses and delivery systems to permit an interventional cardiologist to create shunts between various blood vessels. Moreover, the disclosed shunts can be used to shunt between various hollow organs, as set forth in the present disclosure.
1. A tubular prosthesis, comprising:
an elongate compliant tubular body having a proximal end and a distal end, the elongate compliant tubular body being formed at least in part from a plurality of undulating strut rings arranged axially along a central longitudinal axis of the tubular prosthesis, the central longitudinal axis defining an axial direction;
a distal sealing flange operably coupled to the distal end of the elongate compliant tubular body, the distal sealing flange being formed at least in part from a first undulating filament configured into a shape of a multi-pointed star having a first plurality of convex radially outwardly directed vertices separated by a second plurality of radially inwardly directed concave vertices, the distal sealing flange being configured and arranged to facilitate seating the tubular prosthesis against a first concave vessel wall of a first vessel, wherein the tubular prosthesis is configured to extend outwardly through an ostium formed in the first concave vessel wall when deployed, wherein the distal sealing flange remains inside the ostium after deployment; and
two opposing laterally extending projections operably coupled to the elongate compliant tubular body, the two opposing laterally extending projections being formed by two laterally extending loop portions formed from a second filament shaped into a distal strut ring structurally and physically distinct from the distal sealing flange having a first circumferential portion formed by a first set of undulations that lay in a cylindrical plane that surrounds the longitudinal axis and a second circumferential portion formed by a second set of undulations that also lay in the cylindrical plane, wherein the first circumferential portion and the second circumferential portion are joined to each other by the two laterally extending loop portions, wherein the distal strut ring is located along the axial direction between the distal sealing flange and a penultimate undulating strut ring of the plurality of undulating strut rings, wherein the two laterally extending loop sections extend radially outwardly to a width that is wider than a maximum lateral width of the distal sealing flange, the two laterally extending loop sections being configured to rest in a bottom of the first concave wall of the first vessel on either side of said ostium beyond an outward radial extent of the distal sealing flange to prevent the prosthesis from being pulled through said ostium after deployment.
2. The tubular prosthesis of claim 1 , wherein a membrane covers the elongate compliant tubular body and the distal flange.
3. The tubular prosthesis of claim 2 , wherein the membrane includes a woven or non-woven fabric.
4. The tubular prosthesis of claim 2 , wherein the membrane includes an expanded polytetrafluoroethylene (“ePTFE”) material.
5. The tubular prosthesis of claim 2 , wherein the membrane includes a biological tissue material.
6. The tubular prosthesis of claim 2 , wherein the laterally extending projections are not covered by the membrane.
7. The tubular prosthesis of claim 2 , wherein each of the laterally extending projections includes at least one radiopaque marker formed thereon.
8. The tubular prosthesis of claim 7 , wherein each of the laterally extending projections includes at least one of said radiopaque markers formed thereon at a location that resides at the ostium during implantation.
9. The tubular prosthesis of claim 7 , wherein each of the laterally extending projections further includes at least one radiopaque marker formed near an outward lateral tip of each of the laterally extending projections, respectively.
10. The tubular prosthesis of claim 1 , wherein the two laterally extending loop sections are circumferentially adjacent to respective radially inwardly directed concave vertices of the second plurality of radially inwardly directed concave vertices.
11. The tubular prosthesis of claim 1 , wherein each of the two opposing laterally extending projections lay in a plane that is orthogonal with respect to the central longitudinal axis.
12. The tubular prosthesis of claim 1 , wherein each of the two laterally extending loop sections comprises a closed loop.
13. The tubular prosthesis of claim 1 , wherein each of the two laterally extending loop sections comprises an open “U”-shaped loop.
14. The tubular prosthesis of claim 1 , further comprising:
a proximal sealing flange operably coupled to the proximal end of the elongate compliant tubular body, the proximal sealing flange being formed at least in part from a first proximal undulating filament configured into a shape of a multi-pointed star having a first plurality of convex radially outwardly directed vertices separated by a second plurality of radially inwardly directed concave vertices, the proximal sealing flange being configured and arranged to facilitate seating the tubular prosthesis against a second concave vessel wall of a second vessel, wherein the tubular prosthesis is configured to extend outwardly through a second ostium formed in the second concave vessel wall when deployed, wherein the proximal sealing flange remains inside the second ostium after deployment; and
two further opposing laterally extending projections operably coupled to the proximal end of the elongate compliant tubular body, the two further opposing laterally extending projections being formed by two further laterally extending loop portions formed from a second proximal filament shaped into a proximal strut ring structurally and physically distinct from the proximal sealing flange having a first circumferential portion formed by a first set of undulations that lay in the cylindrical plane that surrounds the longitudinal axis and a second circumferential portion formed by a second set of undulations that also lay in the cylindrical plane, wherein the first circumferential portion and the second circumferential portion are joined to each other by the-two further laterally extending loop sections, wherein the proximal strut ring is located along the axial direction between the proximal sealing flange and a proximal penultimate undulating strut ring of the plurality of undulating strut rings, wherein the two laterally extending loop sections extend radially outwardly to a width that is wider than a maximum lateral width of the distal sealing flange, the two further laterally extending loop portions being configured to rest in a bottom of the second concave wall of the second vessel on either side of said second ostium beyond an outward radial extent of the proximal sealing flange to prevent the prosthesis from being pulled through said second ostium after deployment.