Back to results
US 7,094,255 B2Granted
Expandable stent and method for delivery of same
AssigneeevYsio Medical Devices ULC
InventorsIan M. Penn, Donald R. Ricci
Life of this patent
Estimating the term…
Abstract
An expandable stent having a proximal end and a distal end in communication with one another, and a tubular wall disposed between the proximal end and the distal end. The tubular wall has a longitudinal axis and a porous surface defined by a plurality of intersecting members comprising a series of longitudinal struts disposed substantially parallel to the longitudinal axis of the stent. Each longitudinal strut in the series comprises flexure members for substantially complementary extension and compression of a diametrically opposed pair of the longitudinal struts upon flexure of the stent. The flexure members may comprise first and second curved sections which are of a different size. At least one of the curved sections may comprise an arc of greater than about 180°.
Claims25
An expandable stent comprising:
- a proximal end and a distal end in communication with one another,
- a tubular wall disposed between the proximal end and the distal end, the tubular wall having a longitudinal axis and a porous surface defined by a plurality intersecting members arranged to define a first repeating pattern comprised of a polygon having:
- (i) a pair of side walls substantially parallel to the longitudinal axis,
- (ii) a single concave-shaped first end wall having a first apex, and
- (iii) a single convex-shaped second end wall having a second apex, the concave-shaped first end wall and the convex-shaped second end wall connecting the side walls, at least one of the first apex and the second apex being substantially flat, the stent being expandable from a first, contracted position to a second, expanded position upon the application of a radially outward force on the stent;
- wherein each side wall (i) is connected to a corresponding end wall portion that is substantially orthogonal to the longitudinal axis, and (ii) comprises at least a flex member connected to at least one straight segment disposed substantially parallel to the longitudinal axis, the flex member comprising a curved shape, which curves in a non-radial direction of the stent.
3 more elements
An unexpanded stent comprising:
- a tubular wall having a series of undulating circumferential portions, each circumferential portion comprising alternating peaks and valleys;
- the tubular wall also having a plurality of longitudinal portions connecting said series of undulating circumferential portions to form a porous, cylindrical surface;
- a longitudinal portion of said plurality of longitudinal portions connecting a peak in a first circumferential portion with a valley in a second circumferential portion adjacent to the first circumferential portion;
- and
- each of said plurality of longitudinal portions having a single flexure member interposed between a pair of straight strut portions which are disposed parallel to a longitudinal axis of the stent, the flexure member, comprises a U-shape curving in a non-radial direction of the stent.
2 more elements
An unexpanded stent comprising:
- a tubular wall having a series of undulating circumferential portions, each circumferential portion comprising alternating peaks and valleys;
- the tubular wall also having a plurality of longitudinal portions connecting said series of undulating circumferential portions to form a porous, cylindrical surface;
- a longitudinal portion of said plurality of longitudinal portions connecting a peak in a first circumferential portion with a valley in a second circumferential portion adjacent to the first circumferential portion;
- and
- each of said plurality of longitudinal portions having a flexure member interposed between a pair of straight strut portions which are disposed parallel to a longitudinal axis of the stent, the flexure member, in two dimensions, comprising a U-shape,
- wherein the porous, cylindrical surface comprises a repeating pattern comprised of a polygon having a pair of side walls substantially parallel to a stent longitudinal axis, wherein the polygon further comprises a first wall having a concave shape and a second wall having a convex shape,
- wherein the flexure member is disposed in each of the side walls, and
- wherein at least one of the first wall and the second wall has a flat apex and the other of the first wall and the second wall has a rounded apex.
5 more elements
An unexpanded stent comprising:
- a tubular wall comprising:
- (i) a series of undulating circumferential portions, each circumferential portion comprising alternating peaks and valleys, and
- (ii) a plurality of longitudinal portions connecting said series of undulating circumferential portions to form a porous, cylindrical surface comprising a repeating pattern comprised of a polygon having a pair of side walls substantially parallel to a stent longitudinal axis, and
- wherein a flexure member is disposed in each of the side walls, the polygon further comprising a first wall having a concave shape and a second wall having a convex shape,
- at least one of the first wall and the second wall having a flat apex, and the other of the first wall and the second wall having a rounded apex, the flat apex comprising a pair of rounded shoulders;
- a longitudinal portion connecting a peak in a first circumferential portion with a valley in a second circumferential portion adjacent to the first circumferential portion;
- and
- each of said plurality of longitudinal portions having a curved flexure member that provides lateral flexibility to said stent and is disposed within each of said plurality of longitudinal portions, each said flexure member, in two dimensions, comprising a pair of substantially straight strut portions disposed substantially orthogonal to a longitudinal axis of the stent, the pair of substantially straight strut portions being interconnected by a curved portion.
5 more elements
Dependencies are inferred from the claim text.