STENT WITH OVERLAP AND HIGH EXPANSION

• US 20070233270A1
• Filed: 05/30/2007
• Published: 10/04/2007
• Est. Priority Date: 03/29/2006
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Anderson, James, Weber, Jan, Eidenschink, Tracee, Jagger, Karl
• Granted Patent: US 8,348,991 B2
• Time in Patent Office: Days
• US Class Current: 623/23.700
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• 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 2002/30322 differing in surface structures
• 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 2002/91525 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 2002/91541 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 2002/91583 by a bridge, whereby at least one of its ends is connected along the length of a strut between two consecutive apices within a band
• CPC Class Codes: A61F 2250/0018 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2250/0026 differing in surface structures

Abstract

A stent can comprise a tubular body having a first region and a second region. The tubular body is defined by a plurality of serpentine bands. Each serpentine band comprises a plurality of alternating proximal turns and distal turns connected by struts. The second region comprises a first serpentine band and a second serpentine band that overlap one another about a common stent circumference. The first region comprises a serpentine band that is not overlapped by another serpentine band about a common stent circumference.

Claims

1. A stent having a proximal end and a distal end, the stent comprising:

a tubular body, the tubular body comprising a first region, a second region and a third region, the tubular body defined by a plurality of serpentine bands, each serpentine band comprising a plurality of alternating proximal turns and distal turns connected by struts;

the second region comprising a first serpentine band and a second serpentine band that overlap one another about a common stent circumference; and

the first region and the third region each comprising a serpentine band that is not overlapped by another serpentine band about a common stent circumference.

2. The stent of claim 1, wherein the struts of the first serpentine band and the struts of the second serpentine band overlap about a common stent circumference

3. The stent of claim 1, wherein none of the serpentine bands in the first region or the third region overlap one another.

4. The stent of claim 1, wherein each serpentine band in the second region is overlapped by at least one other serpentine band.

5. The stent of claim 1, the central region further comprising a third serpentine band, wherein the second serpentine band and the third serpentine band overlap one another about a common stent circumference.

6. The stent of claim 1, wherein the first region comprising alternating serpentine bands and connector columns, each connector column comprising a plurality of connector struts, each connector strut connected between two adjacent serpentine bands.

7. The stent of claim 6, wherein the connector columns comprise alternating first connector columns and second connector columns, the first connector columns having connector struts that are different from the connector struts of the second connector columns.

8. The stent of claim 1, wherein serpentine bands of the second region each comprise a plurality of first struts and second struts, every proximal turn connected to a first distal turn by a first strut and to a second distal turn by a second strut, each first strut defining a curvilinear path different from that of each second strut.

9. The stent of claim 1, further comprising an appendage, the appendage comprising a free end located in the second region.

10. The stent of claim 9, the appendage connected at a connected end to a serpentine band in the first region.

11. The stent of claim 10, wherein the appendage is only connected to other stent structure at the connected end.

12. The stent of claim 10, wherein the connected end connects to a proximal peak of the serpentine band and extends in a distal direction.

13. The stent of claim 10, wherein the connected end connects to a strut of the serpentine band.

14. The stent of claim 9, further comprising a plurality of appendages.

15. The stent of claim 14, further comprising a plurality of linking members, each linking member connected between two adjacent appendages.

16. The stent of claim 15, wherein the appendages and linking members comprise a serpentine waveform.

17. The stent of claim 9, the free end of the appendage comprising a peak.

19. The stent of claim 1, wherein the stent is self-expanding and an expanded configuration of the second region comprises a greater diameter than an expanded configuration of the first region.

18. The stent of claim 18, wherein the appendage is connected at one end to a serpentine band in the first region, extends into the second region, loops back at said peak and extends back into the first region.

20. A stent having a proximal end and a distal end, the stent comprising:

a tubular body, the tubular body comprising a first region and a second region, the tubular body defined by a plurality of serpentine bands, each serpentine band comprising a plurality of alternating proximal turns and distal turns connected by struts;

the second region comprising a first serpentine band and a second serpentine band that overlap one another about a common stent circumference; and

each serpentine band located in the first region of the stent occupying a separate and distinct length portion of the stent.