Percutaneous Potts 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 prosthesis having a proximal end, a distal end, and defining an axial direction from the proximal end to the distal end, the prosthesis comprising:
a proximal sealing flange configured and arranged to facilitate seating a proximal end portion of the prosthesis against an interior concave surface of a wall of a first vessel, wherein the prosthesis is configured to extend outwardly through an ostium formed through the wall of the first vessel when deployed, wherein the proximal sealing flange remains inside the ostium after deployment;
a distal sealing flange displaceable from the proximal sealing flange along the axial direction, the distal sealing flange being configured and arranged to facilitate seating a distal end portion of the prosthesis against an interior concave surface of a wall of a second vessel, wherein the prosthesis is configured to extend outwardly through an ostium formed through the wall of the second vessel when deployed, wherein the distal sealing flange remains inside the ostium after deployment; and
a first circumferential undulating strut ring formed from a first undulating filament disposed axially between the proximal sealing flange and the distal sealing flange;
a second circumferential undulating strut ring formed from a second undulating filament disposed axially between the proximal sealing flange and the distal sealing flange, the filament of the second circumferential undulating strut ring being woven and wrapped around the filament of the first circumferential undulating strut ring about a circumference of the prosthesis, wherein the filament of the first circumferential undulating strut ring and the filament of the second circumferential undulating strut ring are configured to slide over each other along the axial direction to permit the prosthesis to collapse along the axial direction into a nested configuration.
2 . The prosthesis of claim 1 , further comprising at least one tension coil spring connecting the proximal sealing flange to the distal sealing flange to cause the prosthesis to collapse into the nested configuration, the at least one tension coil spring being disposed adjacent to each of the first circumferential undulating strut ring and the second circumferential undulating strut ring.
3 . The prosthesis of claim 2 , wherein the at least one tension coil spring includes a plurality of coil springs spaced circumferentially apart from each other about a circumference of the prosthesis.
4 . The prosthesis of claim 1 , further comprising a membrane covering the prosthesis.
5 . The prosthesis of claim 4 , wherein the proximal sealing flange and the distal sealing flange are each formed from an undulating wire forming a star shape, the undulating wire forming a plurality of radially outwardly extending lobes interspersed by a plurality of radially inwardly extending vertices, and further wherein each radially outwardly extending lobe is covered by the membrane material.
6 . The prosthesis of claim 5 , wherein a pair of laterally opposing lobes on each of the proximal sealing flange and the distal sealing flange are larger than other lobes on each said respective sealing flange disposed between the pair of laterally opposing lobes.
7 . The prosthesis of claim 5 , wherein each said flange includes six lobes, wherein each said flange includes three relatively long lobes mutually separated by an angular displacement of about 120 degrees that are interdigitated with three relatively short lobes mutually separated by an angular displacement of about 120 degrees.
8 . The prosthesis of claim 5 , wherein each the proximal sealing flange and the distal sealing flange each includes a further pair of laterally opposing radially outwardly directed projections, wherein each said further pair of projections is formed from a wire loop that is not covered by the membrane material.
9 . The prosthesis of claim 8 , wherein the further pair of projections coupled to the proximal sealing flange are located in an orientation that is rotated 90 degrees about a central axis of the prosthesis with respect to further pair of projections coupled to the distal sealing flange.
10 . A prosthesis having a proximal end, a distal end, and defining an axial direction from the proximal end to the distal end, the prosthesis comprising:
a proximal sealing flange configured and arranged to facilitate seating a proximal end portion of the prosthesis against an interior concave surface of a wall of a first vessel, wherein the prosthesis is configured to extend outwardly through an ostium formed through the wall of the first vessel when deployed, wherein the proximal sealing flange remains inside the ostium after deployment;
a distal sealing flange displaceable from the proximal sealing flange along the axial direction, the distal sealing flange being configured and arranged to facilitate seating a distal end portion of the prosthesis against an interior concave surface of a wall of a second vessel, wherein the prosthesis is configured to extend outwardly through an ostium formed through the wall of the second vessel when deployed, wherein the distal sealing flange remains inside the ostium after deployment;
a plurality of undulating circumferential strut rings disposed axially between the proximal sealing flange and the distal sealing flange; and
at least one tension coil spring connecting the proximal sealing flange to the distal sealing flange to cause the prosthesis to collapse into an axially shortened configuration, the at least one tension coil spring being disposed along an axial direction alongside and radially displaced with respect to each of the plurality of undulating strut rings.
11 . The prosthesis of claim 10 , further comprising a membrane covering the prosthesis.
12 . The prosthesis of claim 11 , wherein the proximal sealing flange and the distal sealing flange are each formed from a plurality of radially outwardly extending lobes, and further wherein each radially outwardly extending lobe is covered by the membrane material.
13 . The prosthesis of claim 11 , wherein each the proximal sealing flange and the distal sealing flange each includes a further plurality of radially outwardly directed projections, each said further plurality of radially outwardly directed projections being formed from a wire loop that is not covered by the membrane material.
14 . The prosthesis of claim 13 , wherein the further plurality of radially outwardly directed projections coupled to the proximal sealing flange are located in an orientation that is rotated about a central axis of the prosthesis with respect to the further plurality of radially outwardly directed projections coupled to the distal sealing flange.
15 . The prosthesis of claim 1 , wherein the filament of the first circumferential undulating strut ring is adjacent and coupled to the proximal sealing flange, and the second circumferential undulating strut ring is adjacent and coupled to the distal sealing flange.
16 . The prosthesis of claim 2 , wherein the at least one tension coil spring is disposed radially inwardly with respect to the first circumferential undulating strut ring.
17 . The prosthesis of claim 2 , wherein the at least one tension coil spring is disposed radially outwardly with respect to the first circumferential undulating strut ring.
18 . The prosthesis of claim 10 , wherein the at least one tension coil spring is disposed radially inwardly with respect to the plurality of undulating circumferential strut rings.
19 . The prosthesis of claim 10 , wherein the at least one tension coil spring is disposed radially outwardly with respect to the plurality of undulating circumferential strut rings.