Stent configurations

• US 7,951,187 B2
• Filed: 02/25/2008
• Issued: 05/31/2011
• Est. Priority Date: 10/09/1997
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Friesen, David L., Ehr, Timothy G.J., Ley, Timothy J., Kveen, Graig L., Brown, Brian J.
• Primary Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US12/036,559
• Publication Number:
  US 20080167706A1
• Time in Patent Office: 1,191 Days
• Field of Search: 623/1.15, 623/1.16, 623/1.17, 623/1.2, 606191-198
• US Class Current: 623/1.15
• 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 2002/91508 the meander having a difference in amplitude along the band
• CPC Class Codes: A61F 2002/91516 the meander having a change in frequency along the band
• CPC Class Codes: A61F 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/9155 Adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/91566 connected trough to trough

Abstract

Improved stent configurations exhibiting limited recoil, resistance to compression and improved longitudinal flexibility.

Claims

1. A stent of generally cylindrical shape comprising a plurality of interconnected cells having relatively wide end portions joined by a narrow center portion, the cells arranged end to end, longitudinally in longitudinal rows with respect to the longitudinal axis of the stent, characterized in that longitudinally adjacent cells are engaged by pairs of longitudinal support members having curved end portions.

2. The stent of claim 1 wherein each cell having relatively wide end portions joined by a narrow center portion is connected to an adjacent such cell via a straight, circumferentially extending connector.

3. The stent of claim 1, the plurality of interconnected cells forming helically extending bands of cells having relatively wide end portions joined by a narrow center portion.

4. The stent of claim 1, the plurality of interconnected cells including cells having a longitudinal axis parallel to the longitudinal axis of the stent.

5. The stent of claim 1, the plurality of interconnected cells including cells having a longitudinal axis perpendicular to the longitudinal axis of the stent.

6. The stent of claim 1 the plurality of interconnected cells including cells having a longitudinal axis perpendicular to the longitudinal axis of the stent and cells having a longitudinal axis parallel to the longitudinal axis of the stent.

7. The stent of claim 1, the relatively wide end portions having inwardly extending loop portions.

8. The stent of claim 1, the relatively wide end portions having a slight inward bend.

9. The stent of claim 2, the stent further comprising a plurality of circumferentially extending segments interconnecting pairs of longitudinal support members.

10. The stent of claim 9, the plurality of interconnected cells including first cells having a longitudinal axis parallel to the longitudinal axis of the stent and second cells having a longitudinal axis parallel to the longitudinal axis of the stent, the first cells having a first shape, the second cells having a second shape, the first shape different than the second shape.

11. The stent of claim 2, the straight, circumferentially extending connector interconnecting the narrow center portion of the cells.

12. The stent of claim 1, the plurality of interconnected cells including first cells having a longitudinal axis parallel to the longitudinal axis of the stent and second cells having a longitudinal axis perpendicular to the longitudinal axis of the stent.

13. The stent of claim 12, the first cells having a first size and the second cells having a second size, the second size being smaller than the first size.

14. The stent of claim 13, the first cells having relatively wide end portions that are substantially straight and narrow center portions that are substantially straight, the second cells having relatively wide end portions that are longitudinal support members and narrow center portions that are the relatively wide end portions of the first cells.

15. The stent of claim 12, the interconnected cells further including third cells having a longitudinal axis parallel to the longitudinal axis of the stent, the first cells having a first shape, the second cells having a second shape, the third cells having a third shape, the first, second and third shapes being different.

16. The stent of claim 15, the first cells having relatively wide end portions with a slight inward bend, the second cells having relatively wide end portions that are the longitudinal support member segments and relatively narrow center portions that are the relatively wide end portions with a slight inward bend, the third cells having relatively wide end portions that are straight and relatively narrow center portions that are the longitudinal support member segments.

17. The stent of claim 15, the first cells having relatively wide end portions with inwardly extending loop portions, the second cells having relatively wide end portions that are substantially straight and relatively narrow center portions that have outwardly extending loop portions, the third cells having relatively wide end portions and relatively narrow center portions that are substantially straight.

18. The stent of claim 12, the first cells and the second cells having the same size and the same shape, adjacent longitudinal rows of first cells being longitudinally staggered and adjacent circumferential rows of second cells being circumferentially staggered.

19. A stent, the stent comprising

a plurality of cells having relatively wide end portions joined by a narrow center portion, the cells arranged end to end, longitudinally in longitudinal rows with respect to the longitudinal axis of the stent;

a plurality of first circumferentially extending segments, longitudinally adjacent cells being engaged by a first circumferentially extending segment; and

a plurality of second circumferentially extending segments, circumferentially adjacent cells being engaged by at least one second circumferentially extending segment.

20. The stent of claim 19, each first circumferentially extending segment extending from a top portion to a bottom portion of longitudinally adjacent cells.

21. The stent of claim 20, each first circumferentially extending segment having a plurality of turns.

22. The stent of claim 20, each second circumferentially extending segment being substantially straight.