TWISTED STENT

• US 20080294267A1
• Filed: 05/25/2007
• Published: 11/27/2008
• Est. Priority Date: 05/25/2007
• Status: Active Grant

• Current Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: Chanduszko, Andrzej J.
• Granted Patent: US 9,265,636 B2
• Time in Patent Office: Days
• US Class Current: 623/23.7
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• 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 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• CPC Class Codes: A61F 2002/91558 connected peak to peak

Abstract

A stent is disclosed and can include a stent body having a longitudinal axis. The stent body can also have a network of struts that can define a plurality of cells defined between interconnected struts. Each of the plurality of cells includes a major axis that is angled with respect to the longitudinal axis to form a cell angle, β.

Claims

1. A stent, comprising:

a stent body having a longitudinal axis, the stent body having a network of struts defining a plurality of cells define between interconnected struts, wherein each of the plurality of cells includes a major axis that is angled with respect to the longitudinal axis to form a cell angle, β

.

2. The stent of claim 1, wherein β

is greater than zero degrees and less than ninety degrees (0°

<

β

<

90°

).

3. The stent of claim 2, wherein β

is greater than one degree and less than sixty degrees (1°

<

β

<

60°

).

4. The stent of claim 3, wherein β

is greater than two degrees and less than forty-five degrees (2°

<

β

<

45°

).

5. The stent of claim 4, wherein β

is greater than five degrees and less than thirty degrees (5°

<

β

<

30°

).

6. The stent of claim 1, wherein the stent body defines a distal end and proximal end, wherein the stent body includes an outer diameter, and wherein the stent is configured so the outer diameter decreases as the distal end and the proximal end are rotated with respect to each other about the longitudinal axis.

7. The stent of claim 1, wherein the stent comprises a shape memory material.

8. The stent of claim 7, wherein the shape memory material comprises a shape memory polymer.

9. The stent of claim 7, wherein the shape memory material comprises a shape memory metal.

10. The stent of claim 9, wherein the shape memory metal comprises a nickel titanium alloy.

11. (canceled)

12. (canceled)

13. (canceled)

14. (canceled)

15. A stent, comprising:

a stent body having a proximal end and distal end, the stent body having a longitudinal axis, wherein the stent is configured to collapse radially about the longitudinal axis as the proximal end is rotated with respect to the distal end.

16. The stent of claim 15, wherein the stent collapses substantially uniformly.

17. The stent of claim 15, wherein the stent body comprises a plurality of struts and a plurality of cells established between the struts.

18. (canceled)

19. (canceled)

20. (canceled)

21. (canceled)

22. (canceled)

23. (canceled)

24. (canceled)

25. (canceled)

26. A stent delivery tool, comprising:

an inner carrier catheter, wherein the inner carrier catheter includes a stent engagement area configured to engage a twisted stent and prevent the twisted stent from rotating relative to the inner carrier catheter.

27. The stent delivery tool of claim 26, wherein the stent engagement area includes a helical structure extending at least partially along the stent engagement area.

28. The stent delivery tool of claim 27, wherein the helical structure comprises a helical groove.

29. The stent delivery tool of claim 27, wherein the helical structure comprises a raised helical rib.

30. The stent delivery tool of claim 27, wherein the helical structure is angled with respect to a longitudinal axis of the inner carrier catheter to form a stent engagement angle, α

.

31. The stent delivery tool of claim 30, wherein a is greater than zero degrees and less than ninety degrees (0°

<

α

<

90°

).

32. The stent delivery tool of claim 31, wherein a is greater than one degree and less than sixty degrees (1°

<

α

<

60°

).

33. (canceled)

34. (canceled)