Implantable prosthetic valve assembly and method for making the same
First Claim
1. A percutaneous prosthetic heart valve assembly having enhanced rigidity, comprising:
- a radially compressible and expandable support stent, the support stent having a compressed state with a compressed diameter for percutaneous delivery of the prosthetic heart valve assembly to an implantation site, the support stent having an expanded state with an expanded diameter for operation of the prosthetic heart valve assembly at the implantation site, the support stent further having a partially collapsed state with a partially collapsed diameter that is between the compressed and expanded diameters for attachment of a valve member and storage of the assembly, the support stent formed with a plurality of circumferential bands, each band comprising a plurality of linear strut members forming a zig-zag configuration, wherein when the support stent is in the partially collapsed state adjacent strut members form angles of between about 50-90°
, and in the expanded state adjacent strut members form angles of about 90-179°
for enhanced rigidity when the support stent is in the expanded state; and
a flexible valve member coupled to the support stent in the partially collapsed state, wherein the valve member has an expanded configuration suitable for functioning as a one-way valve with a corresponding diameter that matches the expanded diameter of the support stent, and attaches at spaced locations within the support stent when the support stent is in the partially collapsed state with locations therebetween that are out of contact with the stent.
1 Assignment
0 Petitions
Accused Products
Abstract
An implantable prosthetic valve assembly having a support stent, or frame, having circumferential struts with multiple bends forming obtuse angles when the valve assembly is expanded to its functional size. The frame can be manufactured with one or more of the circumferential struts in a partially collapsed state and a flexible valve member can be mounted to the partially collapsed frame. The partially collapsed struts can be formed with multiple bends having angles selected to facilitate crimping of the frame to a profile suitable for percutaneous delivery. When the frame is expanded, the bends can expand to form obtuse angles, thereby enhancing the rigidity of the frame to better resist closing forces exerted on the valve assembly.
-
Citations
26 Claims
-
1. A percutaneous prosthetic heart valve assembly having enhanced rigidity, comprising:
-
a radially compressible and expandable support stent, the support stent having a compressed state with a compressed diameter for percutaneous delivery of the prosthetic heart valve assembly to an implantation site, the support stent having an expanded state with an expanded diameter for operation of the prosthetic heart valve assembly at the implantation site, the support stent further having a partially collapsed state with a partially collapsed diameter that is between the compressed and expanded diameters for attachment of a valve member and storage of the assembly, the support stent formed with a plurality of circumferential bands, each band comprising a plurality of linear strut members forming a zig-zag configuration, wherein when the support stent is in the partially collapsed state adjacent strut members form angles of between about 50-90°
, and in the expanded state adjacent strut members form angles of about 90-179°
for enhanced rigidity when the support stent is in the expanded state; anda flexible valve member coupled to the support stent in the partially collapsed state, wherein the valve member has an expanded configuration suitable for functioning as a one-way valve with a corresponding diameter that matches the expanded diameter of the support stent, and attaches at spaced locations within the support stent when the support stent is in the partially collapsed state with locations therebetween that are out of contact with the stent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A percutaneous prosthetic heart valve assembly comprising:
-
a frame that is radially compressible to a compressed state for percutaneous delivery of the valve assembly and radially expandable to an expanded state for operation of the valve assembly at the implantation site, the frame comprising first and second frame portions connected end-to-end, each frame portion comprising a plurality of circumferential struts, each strut formed with multiple bends, and a flexible valve member connected to the second frame portion, and wherein the frame has a partially collapsed state with the first frame portion having a partially collapsed diameter that is between the diameters of the first frame portion in its compressed and expanded states and where the second frame portion is in its expanded state having an inner diameter approximately equal to an outer diameter of the valve member, and in the partially collapsed state of the frame the bends of the first frame portion having angles θ
1 that are less than angles θ
2 of the bends of the second frame portion. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
-
Specification