STENT AND IMPLANTABLE VALVE INCORPORATING SAME
First Claim
1. A stent for an implantable valve comprising:
- (a) a proximal section extending circumferentially around an axis, the proximal section including a plurality of elongated proximal members connected with one another, each of the proximal members having a mean width; and
(b) a leaflet support section extending circumferentially around the axis, the leaflet support section being offset from the proximal section in a distal direction along the axis, the leaflet support section including a plurality of elongated leaflet support members defining a plurality of cusps projecting in the distal direction at locations spaced circumferentially around the axis and a plurality of valleys between the cusps such that two of the leaflet support members bound each valley, the leaflets support members bounding the valleys having mean perimeters greater than the mean perimeters of the proximal members,the stent being radially collapsible and expandable.
1 Assignment
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Accused Products
Abstract
A collapsible stent for an implantable prosthetic valve incorporates leaflet-supporting members having relatively large surface area in comparison to other members defining the remainder of the stent. The leaflet-supporting members may have openings extending through them. The valve leaflets may be attached to the stent so that an attached edge of each leaflet extends along the leaflet-supporting members and is attached to the members by polymer integral with the leaflet overlying the leaflet supporting members and extending into the openings of the leaflet supporting members. The secure attachment resists stress on the leaflets.
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Citations
19 Claims
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1. A stent for an implantable valve comprising:
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(a) a proximal section extending circumferentially around an axis, the proximal section including a plurality of elongated proximal members connected with one another, each of the proximal members having a mean width; and (b) a leaflet support section extending circumferentially around the axis, the leaflet support section being offset from the proximal section in a distal direction along the axis, the leaflet support section including a plurality of elongated leaflet support members defining a plurality of cusps projecting in the distal direction at locations spaced circumferentially around the axis and a plurality of valleys between the cusps such that two of the leaflet support members bound each valley, the leaflets support members bounding the valleys having mean perimeters greater than the mean perimeters of the proximal members, the stent being radially collapsible and expandable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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- 16. An implantable valve comprising a collapsible and expansible stent having a plurality of elongated members, at least some of the members having openings extending therein, and a flexible element formed from a polymeric material, the polymeric material of the flexible element extending into the openings in the members to secure the flexible element to the members.
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18. A method of making an implantable valve comprising the steps of:
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(a) placing a mandrel having leaflet-forming surfaces into a stent having spaced-apart elongated leaflet support members with openings therein so that the leaflet support members of the stent extend along edges of the leaflet-forming surfaces of the mandrel; (b) depositing a flowable composition on the mandrel and stent so that the composition forms layers on the surfaces spanning between members of the stent, contacts the members of the stent and penetrates into the openings of the members; (c) curing the composition to a flexible solid so as to form leaflets extending between the leaflet support members, the leaflets being secured to the members at least in part by cured composition in the openings; and (d) removing the stent and the leaflets from the mandrel. - View Dependent Claims (19)
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Specification