Stent Configurations

• US 20090048661A1
• Filed: 10/28/2008
• Published: 02/19/2009
• Est. Priority Date: 09/10/1998
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Kveen, Graig L., Ehr, Timothy G.J.
• Granted Patent: US 7,988,718 B2
• Time in Patent Office: Days
• US Class Current: 623/1.150
• 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 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/91558 connected peak to peak

Abstract

Improved stent configurations exhibiting limited recoil, resistance to compression and improved longitudinal flexibility are disclosed. The stent comprised of a plurality of annular elements aligned to form a cylindrical stent body. The annular elements are comprised of a plurality of open, generally boomerang-shaped segments interconnected top-to-bottom around each of the annular elements. Adjacent annular elements are interconnected by interconnecting element.

Claims

1-16. -16. (canceled)

17. A stent comprising:

an expandable framework defining a plurality of cells, said framework comprising a plurality of adjacent annular elements connected by interconnecting elements, each annular element comprising a plurality of closed segments, each closed segment defining a V-shaped cell;

the V-shaped cells of a first annular element oriented in a first direction, the V-shaped cells of a second annular element oriented in a second direction.

18. The stent of claim 17, the V-shaped cells of a third annular element oriented in the first direction.

19. The stent of claim 18, the V-shaped cells of a fourth annular element oriented in the second direction.

20. The stent of claim 17, wherein the first direction is opposite the second direction.

21. The stent of claim 17, wherein the first direction extends about a circumference of the stent.

22. The stent of claim 17, wherein each closed segment comprises a peak, a first strut, a valley and a second strut.

23. The stent of claim 22, comprising interconnecting elements that extend between a valley of one annular element and a peak of an adjacent annular element.

24. The stent of claim 22, wherein said stent defines a proximal end and a distal end, the peaks of an annular element located closer to the proximal end than the valleys of that annular element.

25. The stent of claim 22, wherein the first strut of a closed segment is longer than the second strut.

26. The stent of claim 22, wherein each first strut comprises a V-shape and each second strut comprises a V-shape.

27. The stent of claim 26, wherein each second strut is nested with a first strut.

28. The stent of claim 26, wherein first strut and each second strut comprises a proximal portion oriented at an angle to a distal portion.

29. The stent of claim 28, wherein a distal portion of a selected strut of the first annular element is parallel to a proximal portion of a selected strut of the second annular element.

30. The stent of claim 29, wherein the proximal portion of said selected strut of the first annular element is parallel to a distal portion of said selected strut of the second annular element.

31. The stent of claim 26, wherein each first strut and each second strut comprises a curved portion, the curved portions of a selected annular element aligned about a common stent circumference.

32. The stent of claim 31, wherein said common stent circumference comprises a longitudinal midline of said selected annular element.

33. The stent of claim 32, wherein the first struts and the second struts of said selected annular element are bisected by said longitudinal midline.

34. The stent of claim 32, wherein the V-shaped cells of said selected annular element are bisected by said longitudinal midline.

35. The stent of claim 23, wherein each valley of the first annular element is connected to an interconnecting element.

36. The stent of claim 17, comprising cells defined by adjacent annular elements and interconnecting elements.