Stent

Patent metadata

Field	Value
Publication number	US-9795496-B2
Application number	US-201313793188-A
Country	US
Kind code	B2
Filing date	Mar 11, 2013
Priority date	Jan 14, 2011
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

The invention relates to a medical device and a method of using it. The device is a stent which can be percutaneously deliverable with (or on) an endovascular catheter or via other surgical or other techniques and then expanded. The stent is configured to have a central portion defined by “open” cells and at least two end portions, defined by “closed” cells, spaced apart and directly connected to the distal and proximal ends of the central portion of the stent. The stent may also optionally have a covering or a lattice with openings.

First claim

What is claimed is:

1. An endovascular prosthesis, the prosthesis comprising:
a stent comprising a body having a distal end and a proximal end and a longitudinal axis, the body including: a proximal circumferential member including a proximal circumferential row and a proximal undulating helical row and arranged near the proximal end having a plurality of proximal closed cells defined by a plurality of closed cell connectors extending substantially parallel to the longitudinal axis, a distal circumferential member including a distal circumferential row and a distal undulating helical row and arranged near the distal end having a plurality of distal closed cells defined by a plurality of closed cell connectors extending substantially parallel to the longitudinal axis, and a helical element having a length and arranged between and directly connected to the proximal undulating helical row of the proximal circumferential member and the distal undulating helical row of the distal circumferential member, the helical element, the proximal undulating row and the distal undulating row having uniform apex angles and uniform apex amplitude along a length thereof;
a lattice comprising (i) at least two continuous longitudinal segments, and (ii) at least two continuous circumferential segments.

2. The endovascular prosthesis of claim 1 , wherein the lattice comprises a plurality of openings, and wherein the longitudinal segments of the lattice are substantially parallel and longitudinally aligned with the longitudinal axis of the stent, and wherein the circumferential segments are oriented at an angle of between about 45 degrees and about 90 degrees with respect to the longitudinal axis.

3. The endovascular prosthesis of claim 2 , wherein the plurality of openings have a nominal diameter between about 40 μm and about 1000 μm as measured by the largest inscribed circle.

4. The endovascular prosthesis of claim 2 , wherein the size and shape of the plurality of openings are substantially uniform throughout the lattice.

5. The endovascular prosthesis of claim 2 , wherein the plurality of openings in the lattice are arranged in a pattern.

6. The endovascular prosthesis of claim 2 , wherein the plurality of openings have a nominal diameter of about 300 μm as measured by the largest inscribed circle.

7. The endovascular prosthesis of claim 2 , wherein the plurality of openings have a nominal diameter of about 500 μm as measured by the largest inscribed circle.

8. The endovascular prosthesis of claim 7 , wherein the plurality of openings diamond-shaped.

9. The endovascular prosthesis of claim 2 , wherein the plurality of openings have a nominal diameter of about 100 μm as measured by the largest inscribed circle.

10. The endovascular prosthesis of claim 1 , wherein the lattice is a unitary structure.

11. The endovascular prosthesis of claim 1 , further comprising a radiopaque material incorporated within the lattice to aid in fluoroscopic visualization.

12. The endovascular prosthesis of claim 11 , wherein the radiopaque material is gold or tantalum.

13. The endovascular prosthesis of claim 1 , further comprising one or more pharmacokinetic agents associated with the lattice.

14. The endovascular prosthesis of claim 13 , wherein the pharmacokinetic agent comprises a heparin coating applied to the lattice.

15. The endovascular prosthesis of claim 1 , wherein the stent is balloon expandable.

16. The endovascular prosthesis of claim 1 , wherein the stent is self expanding.

17. The endovascular prosthesis of claim 1 having an insertion configuration with a reduced profile, and a deployed configuration with an enlarged profile greater than the insertion profile, wherein the lattice is affixed to the stent so that lengths of the longitudinal segments remains substantially constant between an insertion configuration and a deployed configuration.

18. The endovascular prosthesis of claim 1 , wherein the longitudinal segments and the circumferential segments form square-shaped openings.

19. The endovascular prosthesis of claim 18 , wherein at least a portion of the longitudinal segments is joined to the plurality of closed cell connectors of the stent.

20. The endovascular prosthesis of claim 1 , wherein the lattice is distensible.

21. The endovascular prosthesis of claim 1 , wherein the lattice is polymeric.

22. The endovascular prosthesis of claim 21 , wherein the lattice is a fluoropolymer.

23. The endovascular prosthesis of claim 22 , wherein the lattice is made from polytetrafluoroethylene.

24. The endovascular prosthesis of claim 23 , wherein the lattice is distensible.

25. An endovascular prosthesis having a lumen, the prosthesis comprising:
a stent comprising a body having a distal end and a proximal end and a longitudinal axis, the body including: a proximal circumferential member including a proximal circumferential row and a proximal undulating helical row and arranged near the proximal end having a plurality of proximal closed cells defined by a plurality of closed cell connectors extending substantially parallel to the longitudinal axis, a distal circumferential member including a distal circumferential row and a distal undulating helical row and arranged near the distal end having a plurality of distal closed cells defined by a plurality of closed cell connectors extending substantially parallel to the longitudinal axis, and a helical element having a length and arranged between and directly connected to the proximal undulating helical row and the distal undulating helical row, the helical element, the proximal undulating helical row, and the distal undulating helical row each including uniform apex angles and uniform apex amplitude along a length thereof to form a uniform apex geometry; and
a polymeric lattice having a plurality of continuous longitudinal segments substantially parallel to the longitudinal axis of the stent, and a plurality of continuous circumferential segments at an angle with respect to the longitudinal axis of the stent.

26. The endovascular prosthesis of claim 25 , wherein the longitudinal segments of the polymeric lattice and the circumferential segments of the polymeric lattice form square-shaped openings.

27. The endovascular prosthesis of claim 25 , wherein the circumferential segments are oriented at an angle of between about 45 degrees and about 90 degrees with respect to the longitudinal axis.

28. The endovascular prosthesis of claim 25 , wherein the lattice is polymeric.

29. The endovascular prosthesis of claim 25 , wherein the lattice comprises a fluoropolymer.

30. The endovascular prosthesis of claim 29 , wherein the lattice comprises a polytetrafluoroethylene (PTFE).

31. The endovascular prosthesis of claim 25 , further comprising a heparin coating applied to the lattice.

32. The endovascular prosthesis of claim 25 , wherein the stent is balloon expandable.

33. The endovascular prosthesis of claim 25 , wherein the stent is self expanding.

34. The endovascular prosthesis of claim 25 having an insertion configuration with a reduced profile, and a deployed configuration with an enlarged profile greater than the insertion profile, wherein the lattice is affixed to the stent so that lengths of the longitudinal segments remains substa

Assignees

• Gore & Ass

Inventors

• Armstrong Joseph R
• Cully Edward H
• Franklin Michael W
• Hansen Mark Y
• Lurie Brandon A
• Mcmurray Craig R
• Montgomery William D
• Terry Wendy J
• Tittelbaugh Eric M

Classifications

• A61F2/88 Primary

  the wire-like elements formed as helical or spiral coils · CPC title

• A61F2/07

  Stent-grafts · CPC title

• A61F2002/91558

  connected peak to peak · CPC title

• A61F2220/0075

  sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable · CPC title

• A61F2002/9583

  Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve · CPC title