Prosthetic valve device resistant to backfolding and buckling
A prosthesis includes a tubular graft, a prosthetic valve component, an inflow stent, an outflow stent, and a plurality of body stents disposed between the inflow and outflow stents. Each stent is a sinusoidal patterned radially-expandable ring having a first set of crowns and a second set of crowns, with the first set of crowns disposed closer to an inflow end of the tubular graft than the second set of crowns. The prosthesis is configured to be resistant to backfolding and/or buckling during deployment thereof.
1. A prosthesis for implantation within a body lumen, the prosthesis having a radially expanded configuration and a radially compressed configuration, the prosthesis comprising:
a tubular graft defining a lumen that extends from an inflow end to an outflow end thereof, wherein a longitudinal axis of the prosthesis is defined by the lumen of the tubular graft;
a prosthetic valve component disposed within the lumen of the tubular graft;
an inflow stent attached to the inflow end of the tubular graft;
an outflow stent attached to the outflow end of the tubular graft; and
a plurality of body stents attached to the tubular graft and disposed between the inflow stent and the outflow stent, a first body stent of the plurality of body stents being disposed directly adjacent to the inflow stent and a second body stent of the plurality of body stents being disposed directly adjacent to the outflow stent,
wherein each of the inflow stent, the outflow stent, and each stent of the plurality of body stents is a sinusoidal patterned radially-expandable ring having a first set of crowns and a second set of crowns, the first set of crowns being disposed closer to the inflow end of the tubular graft than the second set of crowns, and
wherein the second set of crowns of each of the inflow stent and each body stent of the plurality of body stents is disposed against and attached to the first set of crowns of an adjacent stent, and
wherein the second body stent is oriented to extend radially outwards in a direction from the first set of crowns thereof to the second set of crowns thereof, the second body stent being oriented at a first acute angle relative to the longitudinal axis of the prosthesis, and wherein the outflow stent is oriented substantially parallel relative to the longitudinal axis of the prosthesis, and
wherein each of the first body stent, the second body stent, and the outflow stent is formed by a wire having a first diameter that is greater than a wire having a second diameter of the remaining body stents of the prosthesis.
2. The prosthesis of claim 1 , wherein the outflow stent is oriented at an angle between 40° and 60° relative to the second body stent.
3. The prosthesis of claim 1 , wherein the first body stent is oriented to extend radially outwards in a direction from the second set of crowns thereof to the first set of crowns thereof and the first body stent is oriented at an angle between 120° and 140° relative to the longitudinal axis of the prosthesis.
4. The prosthesis of claim 1 , wherein the plurality of body stents includes a third body stent and a fourth body stent disposed between the first and second body stents, the third and fourth body stents being oriented to extend substantially parallel to the longitudinal axis of the prosthesis.
5. The prosthesis of claim 1 , wherein the first diameter is between 5% and 10% greater than the second diameter.
6. The prosthesis of claim 1 , wherein the plurality of body stents includes a third body stent and a fourth body stent disposed between the first and second body stents, and
wherein the second set of crowns of the inflow stent is attached to the first set of crowns of the first body stent, and
wherein the second set of crowns of the first body stent is attached to the first set of crowns of the third body stent, and
wherein the second set of crowns of the third body stent is attached to the first set of crowns of the fourth body stent, and
wherein the second set of crowns of the fourth body stent is attached to the first set of crowns of the second body stent, and
wherein the second set of crowns of the second body stent is attached to the first set of crowns of the outflow stent.
7. The prosthesis of claim 6 , wherein the second set of crowns of the inflow stent is attached to the first set of crowns of the first body stent by a reinforced connection including at least two axial suture loops extending over adjacent crowns and at least two transverse suture loops extending over the at least two axial suture loops, and
wherein the second set of crowns of the first body stent is attached to the first set of crowns of the third body stent by a reinforced connection including at least two axial suture loops extending over adjacent crowns and at least two transverse suture loops extending over the at least two axial suture loops, and
wherein the second set of crowns of the third body stent is attached to the first set of crowns of the fourth body stent by a reinforced connection including at least two axial suture loops extending over adjacent crowns and at least two transverse suture loops extending over the at least two axial suture loops, and
wherein the second set of crowns of the fourth body stent is attached to the first set of crowns of the second body stent by a reinforced connection including at least two axial suture loops extending over adjacent crowns and at least two transverse suture loops extending over the at least two axial suture loops, and
wherein the second set of crowns of the second body stent is attached to the first set of crowns of the outflow stent by a reinforced connection including at least two axial suture loops extending over adjacent crowns and at least two transverse suture loops extending over the at least two axial suture loops.
8. The prosthesis of claim 7 , wherein the second set of crowns of the inflow stent is attached to the first set of crowns of the first body stent by a reinforced connection including exactly three axial suture loops extending over adjacent crowns and exactly two transverse suture loops extending over the three axial suture loops, and
wherein the second set of crowns of the first body stent is attached to the first set of crowns of the third body stent by a reinforced connection including exactly three axial suture loops extending over adjacent crowns and exactly two transverse suture loops extending over the three axial suture loops, and
wherein the second set of crowns of the third body stent is attached to the first set of crowns of the fourth body stent by a reinforced connection including exactly three axial suture loops extending over adjacent crowns and exactly two transverse suture loops extending over the three axial suture loops, and
wherein the second set of crowns of the fourth body stent is attached to the first set of crowns of the second body stent by a reinforced connection including exactly three axial suture loops extending over adjacent crowns and exactly two transverse suture loops extending over the three axial suture loops, and
wherein the second set of crowns of the second body stent is attached to the first set of crowns of the outflow stent by a reinforced connection including exactly three axial suture loops extending over adjacent crowns and exactly two transverse suture loops extending over the three axial suture loops.
9. The prosthesis of claim 1 , wherein the tubular graft is formed from a knit fabric.
10. The prosthesis of claim 1 , wherein the second set of crowns of each of the inflow stent and each body stent of the plurality of body stents is attached to the first set of crowns of an adjacent stent via stitching.
11. A method of implanting a prosthesis within a vasculature, the method comprising:
introducing a delivery system into the vasculature of a patient, the delivery system including the prosthesis in a radially compressed configuration which is disposed within a distal portion of the delivery system, wherein the prosthesis includes a tubular graft defining a lumen that extends from an inflow end to an outflow end thereof, a prosthetic valve component disposed within the lumen of the tubular graft, an inflow stent attached to the inflow end of the tubular graft, an outflow stent attached to the outflow end of the tubular graft, and a plurality of body stents attached to the tubular graft and disposed between the inflow stent and the outflow stent, a first body stent of the plurality of body stents being disposed directly adjacent to the inflow stent and a second body stent of the plurality of body stents being disposed directly adjacent to the outflow stent, wherein a longitudinal axis of the prosthesis is defined by the lumen of the tubular graft, and wherein each of the inflow stent, the outflow stent, and each stent of the plurality of body stents is a sinusoidal patterned radially-expandable ring having a first set of crowns and a second set of crowns, the first set of crowns being disposed closer to the inflow end of the tubular graft than the second set of crowns, and wherein the second set of crowns of each of the inflow stent and each body stent of the plurality of body stents is disposed against and attached to the first set of crowns of an adjacent stent, and wherein the second body stent is oriented to extend radially outwards in a direction from the first set of crowns thereof to the second set of crowns thereof, the second body stent being oriented at a first acute angle relative to the longitudinal axis of the prosthesis, and wherein each of the first body stent, the second body stent, and the outflow stent is formed by a wire having a first diameter that is greater than a wire having a second diameter of the remaining body stents of the prosthesis;
tracking the delivery system through the vasculature to a treatment site, wherein the treatment site is one of an inferior vena cava (IVC) or a superior vena cava (SVC); and
deploying the prosthesis to a radially expanded configuration at the treatment site.
12. The method of claim 11 , wherein the treatment site is the inferior vena cava.
13. The method of claim 11 , wherein the treatment site is the superior vena cava.
14. The method of claim 11 , wherein the outflow stent is oriented substantially parallel relative to the longitudinal axis of the prosthesis.
15. The method of claim 11 , wherein the first body stent is oriented to extend radially outwards in a direction from the second set of crowns thereof to the first set of crowns thereof and the first body stent is oriented at an angle between 120° and 140° relative to the longitudinal axis of the prosthesis.
16. The method of claim 11 , wherein the plurality of body stents includes a third body stent and a fourth body stent disposed between the first and second body stents, the third and fourth body stents being oriented to extend substantially parallel to the longitudinal axis of the prosthesis.
17. The method of claim 11 , wherein the first diameter is between 5% and 10% greater than the second diameter.
18. A method of implanting a prosthesis within a vasculature, the method comprising:
introducing a delivery system into the vasculature of a patient, the delivery system including the prosthesis in a radially compressed configuration which is disposed within a distal portion of the delivery system, wherein the prosthesis includes a tubular graft defining a lumen that extends from an inflow end to an outflow end thereof, a prosthetic valve component disposed within the lumen of the tubular graft, an inflow stent attached to the inflow end of the tubular graft, an outflow stent attached to the outflow end of the tubular graft, and a plurality of body stents attached to the tubular graft and disposed between the inflow stent and the outflow stent, a first body stent of the plurality of body stents being disposed directly adjacent to the inflow stent and a second body stent of the plurality of body stents being disposed directly adjacent to the outflow stent, wherein a longitudinal axis of the prosthesis is defined by the lumen of the tubular graft, and wherein each of the inflow stent, the outflow stent, and each stent of the plurality of body stents is a sinusoidal patterned radially-expandable ring having a first set of crowns and a second set of crowns, the first set of crowns being disposed closer to the inflow end of the tubular graft than the second set of crowns, and wherein the second set of crowns of each of the inflow stent and each body stent of the plurality of body stents is disposed against and attached to the first set of crowns of an adjacent stent, and wherein the second body stent is oriented to extend radially outwards in a direction from the first set of crowns thereof to the second set of crowns thereof, the second body stent being oriented at a first acute angle relative to the longitudinal axis of the prosthesis, and wherein the outflow stent is oriented to extend radially outwards in a direction from the first set of crowns thereof to the second set of crowns thereof, the outflow stent being oriented at a second acute angle relative to the longitudinal axis of the prosthesis, the second acute angle being less than the first acute angle;
tracking the delivery system through the vasculature to a treatment site, wherein the treatment site is one of an inferior vena cava (IVC) or a superior vena cava (SVC); and
deploying the prosthesis to a radially expanded configuration at the treatment site.
19. The method of claim 18 , wherein the outflow stent is oriented at an angle between 40° and 60° relative to the second body stent.
20. The method of claim 18 , wherein the first body stent is oriented to extend radially outwards in a direction from the second set of crowns thereof to the first set of crowns thereof and the first body stent is oriented at an angle between 120° and 140° relative to the longitudinal axis of the prosthesis.