Stent with overlap and high extension

• US 20070239257A1
• Filed: 03/29/2006
• Published: 10/11/2007
• Est. Priority Date: 03/29/2006
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Anderson, James, Weber, Jan, Jagger, Karl
• Granted Patent: US 8,043,358 B2
• Time in Patent Office: Days
• US Class Current: 623/1.150
• 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 2002/9155 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 2250/0026 differing in surface structures

Abstract

A stent may comprise a plurality of serpentine bands that overlap along the length of the stent. Each serpentine band may comprise a plurality of alternating first struts and second struts connected by a plurality of alternating proximal turns and distal turns. Each first strut defines a curvilinear path different from that of each second strut.

Claims

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

a tubular body, the tubular body defined by a plurality of serpentine bands;

each serpentine band comprising a plurality of interconnected proximal turns and distal turns, each proximal turn being longitudinally and circumferentially offset from each distal turn, 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 than that of each second strut, each first strut and each second strut having a peak and a valley, the peak of each strut being closer to the connected distal turn than to the connected proximal turn, the valley of each strut being closer to the connected proximal turn than to the connected distal turn, all peaks being substantially aligned along a first stent circumference, all valleys being substantially aligned along a second stent circumference.

2. The stent of claim 1, wherein the peak and the valley of each strut are oriented in opposite directions.

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

4. The stent of claim 3, wherein the distal turns of the first serpentine band are located distal to the common stent circumference, and the proximal turns of the second serpentine band are located proximal to the common stent circumference.

5. The stent of claim 1, wherein a distal turn of one serpentine band is connected to a second strut of an adjacent serpentine band.

6. The stent of claim 1, wherein the distance between the peak and the valley of a first strut is greater than the distance between the peak and the valley of a second strut.

7. The stent of claim 1, wherein each strut comprises a proximal end and a distal end, the distal end of each first strut offset from the proximal end in a first circumferential direction, the distal end of each second strut offset from the proximal end in a second circumferential direction that is different from the first circumferential direction.

8. The stent of claim 1, wherein each first strut comprises a plurality of parallel straight portions.

9. The stent of claim 8, wherein each second strut comprises a plurality of parallel straight portions.

10. The stent of claim 9, wherein the straight portions of the first struts are parallel to the straight portions of the second struts.

11. The stent of claim 1, wherein each serpentine band comprises a plurality of strut pairs, each strut pair comprising a first strut and a second strut connected by a turn, wherein a strut pair included in a first serpentine band is nested within a strut pair included in a second serpentine band.

12. The stent of claim 1, wherein a first serpentine band is overlapped by a second serpentine band along the length of the stent, the first serpentine band having a total length as measured along the length of the stent, the first serpentine band having an overlapped length as measured along the length of the stent, the overlapped length being at least 25% of the total length.

13. The stent of claim 12, the overlapped length being at least 35% of the total length.

14. The stent of claim 1, wherein the stent is expandable from a delivery diameter to an expanded diameter, the expanded diameter being at least 4 times the delivery diameter.

15. The stent of claim 14, the expanded diameter being at least 4.5 times the delivery diameter, the diameters comprising outer stent diameters.

16. The stent of claim 1, further comprising a partial side branch structure comprising at least two outwardly deployable petal structures.

17. The stent of claim 16, wherein the stent may be expanded such that the outwardly deployable petal structures support a vessel bifurcation carina and at least one serpentine band supports a vessel bifurcation contralateral ostial wall.

18. A stent comprising:

a tubular body, the tubular body defined by a plurality of circumferential bands;

each circumferential band comprising of a plurality of interconnected proximal turns and distal turns, each distal turn being longitudinally and circumferentially offset from each proximal turn, every distal turn connected to a first proximal turn by a first strut and to a second proximal turn by a second strut, each first strut defining a curvilinear path different than that of each second strut, each first strut and each second strut having a first bend and a second bend, each first bend of the strut being closer longitudinally along the path to the distal turn which the strut connects than to the proximal turn which the strut connects, each second bend being longitudinally closer along the path to the proximal turn which the strut connects than to the distal turn which the strut connects, all first bends being substantially aligned along a first circumferential axis, all second bends being substantially aligned along a second circumferential axis.

19. A non-helical stent comprising:

a plurality of interconnected serpentine bands including a first serpentine band and a second serpentine band, each serpentine band comprising a plurality of alternating proximal turns and distal turns connected by struts;

wherein the first serpentine band and the second serpentine band overlap such that a common circumference of the stent contacts each strut of the first serpentine band and each strut of the second serpentine band.

20. The stent of claim 19, the first serpentine band having a total length as measured along the length of the stent, the first serpentine band having an overlapped length as measured along the length of the stent, the overlapped length being at least 25% of the total length.

21. The stent of claim 19, comprising a third serpentine band, wherein the second serpentine band and the third serpentine band overlap such that a second common circumference of the stent contacts each strut of the second serpentine band and each strut of the third serpentine band.