Stent device having reduced foreshortening and recoil and method of making same

Patent metadata

Field	Value
Publication number	US-10271975-B2
Application number	US-201313834250-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Mar 15, 2013
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

A stent device includes generally cylindrical rings aligned along a longitudinal axis, and interconnected by interconnecting members. Each interconnecting member includes a first coupling end, a second coupling end, and an elongate portion therebetween. The first coupling end, the elongate portion, and the second coupling end combine in either a first orientation or a second orientation, which are substantially mirror images. For each interconnecting member, the first coupling end can intersect with a midpoint of a transition region of a substantially repeating curved segment on one of the rings, and the second coupling end can intersect with a midpoint of a curved segment of a different and immediately adjacent ring. The interconnecting members can be arranged in rows extending longitudinally along the device. Along each row, consecutive interconnected members alternate between the first orientation and the second orientation. A cover may be provided over the stent device.

First claim

What is claimed is:

1. A stent device, comprising:
a stent comprising a plurality of radially expandable rings arranged in a series along a common longitudinal axis and coupled by a plurality of interconnecting members, each of the plurality of interconnecting members comprising
a first coupling end directly connected to a first one of the radially expandable rings;
a second coupling end opposite the first coupling end and directly connected to a second one of the radially expandable rings; and
an elongate portion extending between the first coupling end and the second coupling end, wherein the first coupling end, the elongate portion, and the second coupling end combine in a first orientation or a second orientation that is substantially a mirror image of the first orientation; and
a biocompatible material cover encapsulating the stent device;
wherein each of the plurality of interconnecting members has a fusiform shape in which a width of each interconnecting member at the center of the elongate portion is the widest position of each interconnecting member, wherein each interconnecting member narrows along its length in both directions from the center of the elongate portion, and wherein the first coupling end forms a first end of the fusiform shape and the second coupling end forms a second end of the fusiform shape;

wherein each of the plurality of radially expandable rings comprises a plurality of substantially repeating bent segments; and
wherein the covered stent device exhibits a foreshortening of about 3% or less when expanded to an operational deployment diameter.

2. The stent device of claim 1 , wherein the foreshortening is about 2% or less.

3. The stent device of claim 1 , wherein the foreshortening is about 1% or less.

4. The stent device of claim 1 , wherein the foreshortening is about 0% or less.

5. A method of manufacturing a stent device, the method comprising the steps of:
forming a plurality of substantially repeating bent segments in a plurality of generally cylindrical rings, each of the plurality of bent segments comprising one substantial peak, one substantial valley, and a transition region leading between the one substantial peak and the one substantial valley, each bent segment having a midpoint on the transition region substantially midway between the one substantial peak and the one substantial valley;
arranging the plurality of rings in a series along a longitudinal axis in such a way that the one substantial peak and the one substantial valley of each bent segment of each ring in the series is substantially a mirror image of one substantial peak and one substantial valley of a corresponding curved segment in an immediately adjacent ring;
forming a plurality of interconnecting members in rows extending longitudinally along the device and connected between the generally cylindrical rings such that along and within each of the rows the interconnecting members alternate with each consecutive occurrence between a first orientation and a second orientation that is a mirror image of the first orientation, each of the plurality of interconnecting members comprising
a first coupling end directly connected to a first one of the rings;
a second coupling end opposite the first coupling end and directly connected to a second one of the rings; and
an elongate portion extending in a substantially straight line along an entire length of the elongate portion and connected between the first coupling end and the second coupling end,
wherein the first coupling end intersects with the midpoint of the transition region of a bent segment of a ring of the plurality of rings and the second coupling end intersects with the midpoint of a bent segment of a different and immediately adjacent ring of the plurality of rings;
wherein each of the plurality of interconnecting members has a fusiform shape in which a width of each interconnecting member at the center of the elongate portion is the widest position of each interconnecting member, wherein each interconnecting member narrows along its length in both directions from the center of the elongate portion, and wherein the first coupling end forms a first end of the fusiform shape and the second coupling end forms a second end of the fusiform shape; and

encapsulating the stent device in a cover comprising a biocompatible material.

6. The method of claim 5 , wherein the first coupling end and the second coupling end of each of the plurality of interconnecting members each comprise an elbow.

7. The method of claim 5 , wherein a number of interconnecting members between any two adjacent rings of the plurality of rings is equal to a number of substantially repeating bent segments in each ring of the plurality of rings.

8. The method of claim 5 , wherein the first coupling end and the second coupling end of each of the plurality of interconnecting members are azimuthally aligned.

9. The method of claim 5 , wherein the first coupling end and the second coupling end of each of the plurality of interconnecting members are circumferentially aligned.

10. The method of claim 5 , wherein each of the plurality of rings is independently expandable in a radial direction.

11. The method of claim 5 , wherein the plurality of substantially repeating bent segments form a generally sinusoidal pattern.

12. The method of claim 5 , wherein a peak-to-valley amplitude quantity is substantially equal for each of the plurality of rings.

13. The method of claim 5 , wherein each of the plurality of bent segments has a substantially uniform width.

14. The method of claim 13 , wherein all of the plurality of bent segments have substantially the same substantially uniform width.

15. The method of claim 5 , wherein the cover covers an entirety of a length of the plurality of rings.

16. The method of claim 15 , wherein the biocompatible material comprises expanded polytetrafluoroethylene (ePTFE).

17. The method of claim 15 , wherein the cover comprises one or more biocompatible materials, one or more coatings, or both.

18. A stent device comprising:
a plurality of radially expandable rings each formed by a plurality of bent segments, each of the plurality of bent segments comprising a peak, a valley, and a transition region leading between the peak and the valley such that the plurality of bent segments repeats sinusoidally, each bent segment having a midpoint on the transition region substantially midway between the peak and the valley, the plurality of radially expandable rings being arranged in a series concentrically along a longitudinal axis such that the peak and the valley of each bent segment of each radially expandable ring in the series is substantially a mirror image of the peak and the valley of a corresponding bent segment in an immediately adjacent ring; and
a plurality of interconnecting members coupling the plurality of radially expandable rings together, each of the interconnecting members consisting of:
a first coupling end directly connected to a first one of the radially expandable rings;
a second coupling end opposite the first coupling end and directly connected to a second one of the radially expandable rings, the first and second coupling ends for each interconnecting member formed as a pair of elbows that: (i) both extend circumferentially in a same direction for that interconnecting member and (ii) are both azimuthally aligned, such that a first straight line connecting each pair of elbows is parallel to the longitudinal axis; and
an elongate portion extending along an entire length of the elongate

Assignees

• Atrium Medical Corp

Inventors

• Lane John
• Heim David
• Schick Christine
• Vosberg Jennifer L
• Hamelin Susan

Classifications

• A61F2/915

  with bands having a meander structure, adjacent bands being connected to each other · CPC title

• A61F2002/91583

  by a bridge, whereby at least one of its ends is connected along the length of a strut between two consecutive apices within a band · CPC title

• A61F2002/91541

  Adjacent bands are arranged out of phase · CPC title

• A61F2002/072

  Encapsulated stents, e.g. wire or whole stent embedded in lining · CPC title

• A61F2/89 Primary

  the wire-like elements comprising two or more adjacent rings flexibly connected by separate members · CPC title