Endoluminal cardiac and venous valve prostheses and methods of manufacture and delivery thereof
View Patent ↗This invention relates to prosthetic cardiac and venous valves and a single catheter device and minimally invasive techniques for percutaneous and transluminal valvuloplasty and prosthetic valve implantation.
1. An implantable valvular prosthesis, comprising;
a cylindrical stent body member having luminal and abluminal surfaces thereof and a central annular opening along a central longitudinal axis of the stent body member;
a graft member covering at least a portion of at least one of the luminal and abluminal surfaces of the stent body member;
a proximal flange and distal flange; wherein both the proximal flange and distal flange define opposing ends of the stent body member and project radially outward, substantially perpendicular and away from the central longitudinal axis of the stent body member upon deployment and radial expansion of the stent body member, and wherein each proximal flange and the distal flange are defined by a plurality of stent struts and interstices between adjacent struts;
at least one valve flap member biased to a closed position under zero pressure differential across the prosthesis, the closed position acting to occlude the central annular opening of the stent body member; and
a flow regulation strut coupled to the proximal flange and an intermediate annular section and coupled to the valve flap member, the flow regulation strut imparting a bias to the valve flap member.
2. The implantable valvular prosthesis of claim 1 , wherein the graft member further comprises an inner graft member coupled to the luminal surface of the stent body member.
3. The implantable valvular prosthesis of claim 2 , wherein the at least one valve flap member comprise a plurality of valve flap members coupled to the inner graft member.
4. The implantable valvular prosthesis of claim 3 , wherein the valve flap members are coupled at equidistantly spaced intervals about a luminal surface of the inner graft member.
5. The implantable valvular prosthesis of claim 2 , wherein the graft member further comprises an outer graft member coupled to the abluminal surface of the stent body member through an interstices of the stent body member.
6. The implantable valvular prosthesis of claim 5 , wherein the at least one valve flap member comprise a plurality of valve flap members coupled to the inner graft member.
7. The implantable valvular prosthesis of claim 5 , wherein the outer graft member is coupled to the abluminal surface of the stent body member in the intermediate annular section.
8. The implantable valvular prosthesis of claim 1 , wherein the flow regulation strut has a length which is greater than a length of a radius of the central annular opening of the stent body member.
9. The implantable valvular prosthesis of claim 1 , wherein the flow regulation strut projects radially inward toward the central longitudinal axis of the stent body member.
10. The implantable valvular prosthesis of claim 1 , wherein the flow regulator strut projects radially inward toward the central longitudinal axis of the stent body member when in a zero-strain state.
11. An implantable valvular prosthesis, comprising;
a stent body member including luminal and abluminal surfaces, a proximal anchor flange, a distal anchor flange, an intermediate annular section interconnecting the proximal anchor flange and the distal anchor flange, and a central annular opening along a central longitudinal axis of the stent body member;
a graft member covering at least a portion of at least one of the luminal and abluminal surfaces of the stent body member;
the proximal flange and distal flange define opposing ends of the stent body member and project radially outward, substantially perpendicular, and away from the central longitudinal axis of the stent body member upon deployment and radial expansion of the stent body member;
at least one valve flap member biased to a closed position under zero pressure differential across the prosthesis in the intermediate annular section, the closed position acting to occlude the central annular opening of the stent body member; and
a flow regulator strut coupled to a junction of the intermediate annular section and the proximal annular flange, wherein the flow regulator strut is coupled to the valve flap member imparting a bias to the valve flap member.
12. The implantable valvular prosthesis of claim 11 , wherein the proximal anchor flange and the distal anchor flange are defined by a plurality of stent struts and interstices between adjacent struts.
13. The implantable valvular prosthesis of claim 12 , wherein the proximal anchor flange is configured to have one or more stent struts eliminated to define an open region positioned to prevent the prosthesis from impinging upon an adjacent structure.
14. The implantable valvular prosthesis of claim 11 , wherein the graft member further comprises an inner graft member coupled to the luminal surface of the stent body member.
15. The implantable valvular prosthesis of claim 14 , wherein the at least one valve flap member comprise a plurality of valve flap members coupled to the inner graft member.
16. The implantable valvular prosthesis of claim 15 , wherein the valve flap members form a pocket between the intermediate annular section and the proximal anchor flange.
17. The implantable valvular prosthesis of claim 14 , wherein the graft member further comprises an outer graft member coupled to the abluminal surface of the stent body member, the outer graft member encloses at least a portion of the intermediate annular section, and the inner graft member is coupled to the outer graft member through the intermediate annular section.
18. The implantable valvular prosthesis of claim 17 , wherein the at least one valve flap member comprise a plurality of valve flap members coupled to the outer graft member.
19. The implantable valvular prosthesis of claim 11 , wherein the flow regulator strut has a length which is greater than a length of a radius of the central annular opening of the stent body member.