Portal design for stent for treating bifurcated vessels

• US 7,465,315 B2
• Filed: 07/28/2006
• Issued: 12/16/2008
• Est. Priority Date: 11/19/2003
• Status: Expired due to Fees

• Current Assignee: Advanced Cardiovascular Systems Incorporated (Abbott Laboratories)
• Original Assignee: Advanced Cardiovascular Systems Incorporated (Abbott Laboratories)
• Inventors: Morris, Grayson, Lumauig, Rommel
• Primary Examiner(s): GHERBI, SUZETTE JAIME J
• Application Number:
  US11/495,081
• Publication Number:
  US 20060265050A1
• Time in Patent Office: 872 Days
• Field of Search: 623 111- 136
• US Class Current: 623/1.15
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/91516 the meander having a change in frequency along the band
• CPC Class Codes: A61F 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2250/0036 differing in thickness

Abstract

A stent pattern includes an improved portal region for repairing a main vessel and a side branch vessel forming a bifurcation. More particularly, the stent has rings aligned along a common longitudinal axis that are connected by links, where the stent has a proximal section, a distal section, and a central section (portal region). The number of rings and the expanded diameter of the sections are varied to create a “trap door” capable of expanding to a slightly larger diameter than the proximal section and the distal section of the stent. The configuration of the stent pattern of the portal region prevents the occurrence of portal overlap of immediately adjacent rings into the portal region during stent deployment. The stent is implanted at a bifurcation so that the proximal section and the distal section are in the main vessel, and the central section contacts at least a portion of the opening to the side branch vessel. A second stent can be implanted in the side branch vessel and abut the expanded central section to provide full coverage of the bifurcated area in the main vessel and the side branch vessel.

Claims

1. A stent for repairing a bifurcated vessel, comprising:

a cylindrical body having a plurality of rings aligned along a common longitudinal axis;

each ring having a delivery diameter and an implanted diameter and a plurality of peaks configured to spread apart to permit the rings to expand radially outwardly or compress radially inwardly;

the cylindrical body having a proximal section, a distal section, and a central section;

each ring being connected to each adjacent ring by at least one link extending between peaks wherein such peaks point in a same direction; and

at least one peak of a central section ring being connected to at least one peak of a proximal section ring by at least one link wherein the connected peaks point toward each other, and at least one peak in every ring is not connected to any peak in an adjacent ring.

2. The stent of claim 1, wherein the rings of the proximal section have between eight and twenty four peaks, the rings of the distal section have between eight and twenty four peaks, and the rings of the central section have between ten and thirty peaks.

3. The stent of claim 1, wherein the rings of the proximal section have fourteen peaks, the rings of the distal section have twelve peaks, and the rings of the central section have sixteen peaks.

4. The stent of claim 1, wherein the number of peaks in the ring(s) of the central section is greater than the number of peaks in any of the rings in either the proximal section or the distal section.

5. The stent of claim 1, wherein at least some of the links have a straight segment.

6. The stent of claim 1, wherein at least some of the links have a curved segment.

7. The stent of claim 1, wherein at least some of the links have a straight segment and a curved segment.

8. The stent of claim 1, wherein at least some of the links have a non-linear segment.

9. The stent of claim 1, wherein the cylindrical body has a distal opening, a proximal opening, and a central opening.

10. The stent of claim 9, wherein the distal opening and the proximal opening are aligned along the stent longitudinal axis.

11. The stent of claim 10, wherein the central opening is radially offset relative to the alignment of the distal opening and the proximal opening.

12. The stent of claim 1, wherein the stent is formed from metal.

13. The stent of claim 12, wherein the metal is taken from the group of metals including stainless steel, titanium, nickel-titanium, cobalt-chromium, cobalt-chromium-vanadium, cobalt-chromium-tungsten, gold, silver, platinum, or platinum-iridium.

14. The stent of claim 1, wherein the at least one link has a thickness in the range from about 0.001 inch (0.025 mm) up to about 0.006 inch (0.152 mm).

15. The stent of claim 1, wherein the at least one link has a width in the range from about 0.001 inch (0.025 mm) up to about 0.006 inch (0.152 mm).

16. The stent of claim 1, wherein the at least one link has a straight segment.

17. The stent of claim 1, wherein the at least one link has a curved segment.

18. The stent of claim 1, wherein the at least one link has a straight segment and a curved segment.

19. The stent of claim 1, wherein the at least one link has a non-linear segment.

20. The stent of claim 1, wherein the central section includes one ring having sixteen peaks such that one peak of the central section is connected to one peak of the proximal section by two links.

21. The stent of claim 1, wherein the ring or rings in the central section of the stent have a corresponding set of nested peaks within peaks of the ring or rings of the central section.

22. The stent of claim 1, wherein the stent is coated with at least one layer of a drug.

23. The stent of claim 1, wherein the stent is coated with at least one layer of a therapeutic agent.

24. The stent of claim 1, wherein at least a portion of the stent is coated with a primer material, which adheres to the stent, the primer material being coated with at least one layer of a therapeutic agent or drug.

25. The stent of claim 1, wherein the plurality of first peaks in the central section differing from the plurality of first peaks in the proximal section and the distal section.

26. A stent for repairing a bifurcated vessel, comprising:

a cylindrical body having a plurality of rings aligned along a common longitudinal axis;

each ring having a delivery diameter and an implanted diameter and a plurality of first peaks configured to spread apart to permit the rings to expand radially outwardly or compress radially inwardly;

the cylindrical body having a proximal section, a distal section, and a central section;

at least one first peak of the central section being connected to at least one first peak of the proximal section by at least one link wherein the connected first peaks point toward each other, and at least one first peak in every ring is not connected to any first peak in an adjacent ring; and

wherein a central opening of the distal section is adjacent to the at least one first peak of the central section that is connected to the at least one first peak of the proximal section by the at least one link.

27. The stent of claim 26, wherein two first peaks of the central section are each connected to one first peak of the proximal section and to one second peak of the proximal section by one link in an out of phase configuration.

28. The stent of claim 26, wherein at least one ring of the proximal section is connected to an adjacent ring of the proximal section in an in phase configuration.

29. The stent of claim 26, wherein at least one ring of the distal section is connected to at least one adjacent ring of the distal section in an in phase configuration.

30. The stent of claim 26, wherein at least one ring of the central section is connected to at least one adjacent ring of at least one of the proximal section and the distal section in an in phase configuration.

31. A stent for repairing a bifurcated vessel, comprising:

a cylindrical body having a plurality of rings aligned along a common longitudinal axis;

each ring having a delivery diameter and an implanted diameter and a plurality of first peaks configured to spread apart to permit the rings to expand radially outwardly or compress radially inwardly;

the cylindrical body having a proximal section, a distal section, and a central section;

the proximal section having between one and fifteen rings;

the distal section having between one and fifteen rings;

the central section having between one and ten rings;

the central section having an expanded diameter greater than the expanded diameter of the proximal section and the distal section; and

at least one first peak of the central section is connected to at least one first peak of the proximal section by at least one link wherein the connected first peaks point toward each other, and at least one first peak of any one ring is not connected to any first peak of an adjacent ring.

32. A stent for repairing a bifurcated vessel, comprising:

a cylindrical body having a plurality of rings aligned along a common longitudinal axis;

each ring having a delivery diameter and an implanted diameter and a plurality of first peaks configured to spread apart to permit the rings to expand radially outwardly or compress radially inwardly;

the cylindrical body having a proximal section, a distal section, and a central section;

means for connecting the plurality of first peaks so that at least one first peak of the central section is connected to at least one first peak of the proximal section wherein the connected first peaks point toward each other, and at least one first peak of any one ring is not connected to any first peak of an adjacent ring.

33. The stent of claim 32, wherein the means for connecting the plurality of first peaks is at least one link.