Hybrid stent having a fiber or wire backbone

• US 20070219642A1
• Filed: 03/28/2007
• Published: 09/20/2007
• Est. Priority Date: 12/03/1998
• Status: Abandoned Application

• Current Assignee: Medinol Limited (Medinol USA Incorporated)
• Original Assignee: Medinol Limited (Medinol USA Incorporated)
• Inventors: Richter, Jacob
• Application Number:
  US11/729,516
• Publication Number:
  US 20070219642A1
• Time in Patent Office: Days
• US Class Current: 623/23.700
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/828 Means for connecting a plurality of stents allowing flexibility of the whole structure
• CPC Class Codes: A61F 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2250/0071 breakable or frangible
• CPC Class Codes: A61L 31/022 Metals or alloys
• CPC Class Codes: A61L 31/042 Polysaccharides
• CPC Class Codes: A61L 31/148 Materials at least partially resorbable by the body
• CPC Class Codes: C08L 67/00 Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain of polyester-amides C08L77/12; of polyester-imides C08L79/08; Compositions of derivatives of such polymers

Abstract

A stent is provided with a series of short pieces or sections connected together by at least one polymer fiber or wire. The polymer fiber or wire can be biodegradable or durable. The fiber polymers may also contain beads, blobs and bulges in the fibers. The stent sections are designed to separate or articulate with time as the body lumen moves in response to biological and physiological events.

Claims

1. A stent for implantation in a vessel, comprising:

a plurality of stent sections; and

at least one polymer fiber material interconnecting said sections in an initially unitary stent structure.

2. The stent in claim 1, said material is biodegradable.

3. The stent of claim 1 wherein the fibers further comprise beads, blobs or bulges.

4. The stent of claim 3 where the beads, blobs or bulges contain drug.

5. The stent of claim 3 wherein the fibers further comprise beads.

6. The stent of claim 3 wherein the fibers further comprise blobs.

7. The stent of claim 3 wherein the fibers further comprise bulges.

8. The stent in claim 1, said plurality of sections are circumferential sections.

9. The stent in claim 1, said material is helically wound about the stent sections.

10. The stent in claim 1, each of said plurality of sections is formed of a single sinusoidal pattern.

11. The stent in claim 10, each of said single sinusoidal patterns is uniform.

12. The stent of claim 1, each of said plurality of sections have a plurality of sinusoidal patterns.

13. The stent of claim 12, each of said plurality of sinusoidal patterns are uniformly designed.

14. The stent of claim 1, said material includes a fenestration to promote faster growth of neo-intima.

15. The stent of claim 1, further including a multiplicity of fibers connected to said stent sections extending in a plurality of directions relative to the stent longitudinal axis and connecting the stent sections.

16. The stent of claim 1, further including a multiplicity of fibers connected to said stent sections extending in a single direction relative to the stent longitudinal.

31. The stent of claim 1, each stent section further comprises a first loop containing section with loops occurring at a first frequency and a second loop containing section with loops also occurring at said first frequency and a third loop containing section having loops occurring at a second frequency that is higher than said first frequency, said third loop containing section disposed between said first and second loop containing sections, and consecutively joined for at least two repetitions to said first and second loop containing sections.

32. The stent of claim 31, said first and said third loop containing sections or said second and said third loop containing sections form at least one cell, said cell having an interior, and said high frequency loops are in a ratio of 3:

2 to said low frequency loops.

33. The stent of claim 31, said higher frequency loop containing section is smaller in width compared to said lower frequency loop containing section.

34. The stent of claim 31, said higher frequency loop containing section is 180 degrees out of phase with adjacent high frequency loop containing sections.

17. A stent for implantation in a vessel, comprising:

a plurality of individual pieces coupled by polymer fibers; and

said polymer fibers adapted to permit said plurality of pieces to separate from each other in a controlled manner in response to physiological conditions.

19. The stent according to claim 17 wherein the polymer fibers further comprise beads.

20. The stent of claim 17 wherein the polymer fibers further comprise blobs.

21. The stent of claim 17 wherein the polymer fibers further comprise bulges.

22. The stent of claim 19 further comprising a drug.

23. The stent of claim 20 further comprising a drug.

24. The stent of claim 21 further comprise a drug.

25. The stent of claim 17, said polymer fibers inhibit embolization.

26. The stent of claim 17, said polymer fibers are non-biodegradable.

27. The stent of claim 17, said polymer fibers are biodegradable.

29. The stent of claim 17, said stent is balloon expanded or self-expanded.

30. The stent of claim 17, each piece further comprises a plurality of sinusoidal patterns, said sinusoidal patterns are generally arranged in the circumferential direction of the stent and are periodically interconnected thereto.

18. A stent for implantation in a vessel, comprising:

a plurality of individual pieces coupled by polymer fibers; and

said polymer fibers adapted to permit said plurality of pieces to move independent of each other in a controlled manner in response to physiological conditions.

28. The stent of claim 18, said polymer fibers are durable.

35. A stent for implantation in a vessel, comprising:

a plurality of segments;

a plurality of polymer fibers for connecting adjacent said plurality of stent segments; and

said polymer fibers adapted to permit said adjacent stent segments to separate from each other in a controlled manner in response to physiological conditions placed on said stent.

38. The stent of claim 35, said fibers are biodegradable made of a polymer is made of a polymer selected from the group consisting of polyglycolide, polylactide, polycaprolactone, polydioxanone, poly(lactide-co-glycolide), polyhydroxybutyrate, polyhydroxyvalerate, trimethylene carbonate, and any combination thereof.

40. The stent of claim 35 or 36 wherein the polymer fibers further comprise fiber beads.

41. The stent of claim 40 further comprising a drug.

42. The stent of claim 35 or 36 wherein the polymer fibers further comprise fiber blobs.

43. The stent of claim 42 further comprising a drug.

44. The stent of claim 35 or 36 wherein the polymer fibers further comprise fiber blobs.

45. The stent of claim 44 further comprising a drug.

46. The stent of claim 35, said fibers are non-biodegradable.

48. The stent of claim 35 where the stent segments are made of an amorphous alloy.

36. A stent for implantation in a vessel, comprising:

a plurality of stent segments;

a plurality of polymer fibers for connecting adjacent said plurality of stent segments; and

said polymer fibers adapted to permit said adjacent stent segments to move independently to each other in a controlled manner in response to physiological conditions placed in the stent.

37. The stent of claim 36, said fibers are biodegradable made of a polymer selected from the group consisting of polyesters, polyanhydrides, polyorthoesters, polyphosphazenes, and any combination thereof.

39. The stent of claim 36 wherein the fibers are durable fibers.

47. The stent of claim 36 where the fibers are made of polytetrafluoreothylene (ePTFE).

49. A covering for a stent, comprising a durable polymeric material having fibers and beads, blobs or bulges containing a drug.