Stent cell configurations

• US 6,231,599 B1
• Filed: 05/07/1999
• Issued: 05/15/2001
• Est. Priority Date: 03/04/1998
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Ley, Timothy J.
• Primary Examiner(s): Milano, Michael J.
• Application Number:
  US09/307,580
• Time in Patent Office: 739 Days
• Field of Search: 623/1.15, 623/1.16, 623/1.1
• 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 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/9155 Adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/91558 connected peak to peak

Abstract

A generally cylindrical, radially expandable stent having a plurality of interconnected cells which are formed of at least three sections defined by interconnected segments arranged relative to each other. The sections radiate from a common center within the cell and have enlarged end portions. The cells may be of triskelion-like or trifurcate configuration. Stents made up of a series of generally triangular-like expansion cell elements are also disclosed.

Claims

1. A generally cylindrical, radially expandable stent comprised of a plurality of interconnected cells, in which at least some of the cells are formed of interconnected segments comprised of:

a first set of three segments arranged relative to each other in triangular spaced positions;

a second set of three segments arranged relative to each other in triangular spaced positions;

the first and second sets being further arranged and positioned relative to each other so as to place the second set in an outer position with respect to paired ends of the first set, and

a series of connectors connecting adjacent ends of the first set of segments to adjacent ends of the second set of segments.

2. The stent of claim 1 in which the series of connectors are curvilinear.

3. The stent of claim 1 in which the series of connectors are straight.

4. The stent of claim 1 wherein the segments of the two sets are straight segments.

5. The stent of claim 1 wherein the segments of the two sets are arcuate segments.

6. The stent of claim 1 wherein the cells ar e interconnected by means of connector segments.

7. The stent of claim 6 wherein the connector segments extend from inner segments in some cells to inner segments of adjacent cells in at least some of the cells making up the stent.

8. The stent of claim 7 wherein the inner segments are straight.

9. The stent of claim 6 wherein the connector segments are straight segments.

10. The stent of claim 6 wherein the connector segments are curvilinear.

11. The stent of claim 6 wherein the connector segments extend from inner segments in some cells to outer segments on adjacent cells in at least some of the cells making up the stent.

12. The stent of claim 11 wherein the inner and outer segments are straight.

13. The stent of claim 1 wherein the cells are internested, sharing common segments.

14. The stent of claim 1 wherein the cells are arranged in a predetermined pattern.

15. The stent of claim 11 wherein the pattern comprises longitudinal rows.

16. The stent of claim 1 wherein the cells are arranged in parallel longitudinal rows.

17. The stent of claim 1 wherein the cells are skewed with respect to their position relative to the longitudinal axis of the stent.

18. The stent of claim 1 wherein the cells are arranged in vertical rows around the circumference of the stent.

19. A generally cylindrical, radially expandable stent comprised of a network of interconnected cells, in which at least some of the cells are formed of interconnected segments which define three sections radiating from a common center, the cells having an overall configuration which is trichotomous.

20. The stent of claim 19, the trichotomous cells being further characterized by having a triskelion-like configuration with the axes thereof radiating from a common center.

21. The stent of claim 19 in which at least some of the cell segments are relatively straight and some of the segments are relatively curved, segments being disposed relative to each other in a predetermined pattern, the curved segments joining adjacent straight segments together to form the pattern into a closed cell configuration.

22. The stent of claim 19 wherein the cells are arranged in parallel longitudinal rows.

23. The stent of claim 19 wherein the cells are skewed with respect to their position relative to the longitudinal axis of the stent.

24. The stent of claim 19 wherein all of the cell segments are arcuate.

25. A stent comprised of a plurality of interconnected cells, in which at least some of the cells are formed of at least three sections defined by interconnected segments arranged relative to each other, the sections radiating from a common center within the cell, the sections having enlarged end portions.

26. The stent of claim 25 in which the three sections are of a straight configuration and the enlarged end portions are lobed.

27. The stent of claim 25 in which at least some of the cells comprise six sections, the sections radiating from a common center within the cell, the sections having enlarged end portions.

28. The stent of claim 25 wherein the sections are symmetrically disposed about the common center.

29. The stent of claim 25 in which at least some of the cells comprise three six sections, the sections radiating from a common center within the cell, the sections having enlarged end portions.