Stent anchoring system

Patent metadata

Field	Value
Publication number	US-12029666-B2
Application number	US-202217744360-A
Country	US
Kind code	B2
Filing date	May 13, 2022
Priority date	Nov 9, 2016
Publication date	Jul 9, 2024
Grant date	Jul 9, 2024

Abstract

An illustrative stent may comprise an elongated tubular member having a first end and a second end and an intermediate region disposed therebetween. The elongated tubular member may include at least one barb attached thereto. The barb may be configured to be tucked under a filament of the stent during delivery of the stent and protrude radially from the stent, when the stent is deployed.

First claim

What is claimed is:

1. A stent, the stent comprising:
an elongated tubular member comprising at least one filament interwoven to ferric define a plurality of cells, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration; and
at least one barb fixed to the at least one filament that is interwoven to define the plurality of cells, the at least one barb having a first end, a second end, and a middle region extending therebetween, wherein both the first end and the second end are fixed to the at least one filament at spaced apart positions, and the middle region is free of attachment to the elongated tubular member in the expanded configuration;
wherein the middle region of the at least one barb is configured to be positioned radially inward of and under an adjacent winding of the at least one filament when the elongated tubular member is in the collapsed configuration and to extend radially away from the elongated tubular member when the elongated tubular member is in the expanded configuration.

2. The stent of claim 1 , wherein the at least one barb is formed from a wire.

3. The stent of claim 2 , wherein the at least one barb is triangular shaped with the middle region defining a pointed free end.

4. The stent of claim 3 , wherein the wire defines two sides of the triangular shaped barb and a section of the at least one filament between the first and second ends of the at least one barb defines a third side, with an opening extending transversely through the triangular shaped barb.

5. The stent of claim 1 , wherein the spaced apart positions where the first end and the second end of the wire are fixed results in the at least one barb functioning as a spring and increasing or decreasing an angle of protrusion relative to the elongated tubular member based on a degree of elongation or collapse of the elongated tubular member.

6. The stent of claim 1 , wherein in the collapsed configuration the plurality of cells have a first profile and in the expanded configuration the plurality of cells have a second profile different from the first profile, wherein in the first profile a major dimension of the plurality of cells extends along a longitudinal axis of the elongated tubular member.

7. The stent of claim 6 , wherein in the second profile the major dimension of the plurality of cells extends along a circumference of the elongated tubular member.

8. The stent of claim 1 , wherein the at least one barb comprises a plurality of barbs spaced along a length and a circumference of the elongated tubular member.

9. The stent of claim 1 , wherein the at least one barb comprises a plurality of barbs, wherein at least some of the plurality of barbs have a first length and at least some of the plurality of barbs have a second length different from the first length.

10. The stent of claim 1 , wherein the at least one barb is biased to extend radially outward from the elongated tubular member when unconstrained.

11. The stent of claim 1 , wherein the at least one barb comprises a material combination which behaves like a temperature sensitive bimetallic strip.

12. A stent, the stent comprising:
an elongated tubular member comprising at least one filament that extends in a helical direction and is interwoven to form a plurality of cells, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration; and
a plurality of barbs fixed to a portion of the at least one filament that extends in a helical direction, each of the plurality of barbs having a first end, a second end, and a middle region extending therebetween, wherein both the first end and the second end are fixed to the portion of the at least one filament that extends in the helical direction, and the middle region is free of attachment to the elongated tubular member in the expanded configuration, such that the middle region of each of the plurality of barbs forms a point extending away from the at least one filament to which the first and second ends of each of the plurality of barbs are fixed;
wherein the middle region of each of the plurality of barbs is configured to be positioned radially inward of and under an adjacent winding of the at least one filament when the elongated tubular member is in the collapsed configuration and to extend radially away from the elongated tubular member when the elongated tubular member is in the expanded configuration.

13. The stent of claim 12 , wherein the plurality of barbs are formed from a wire.

14. The stent of claim 13 , wherein each of the plurality of barbs is triangular shaped, and the wire defines two sides of the triangular shaped barb, the first and second ends are fixed to the portion of the at least one filament at spaced apart positions, and a section of the at least one filament between the first and second ends of each of the plurality of barbs defines a third side, with an opening extending transversely through the triangular shaped barb.

15. The stent of claim 14 , wherein the spaced apart positions where the first end and the second end of the wire are fixed results in each of the plurality of barbs functioning as a spring and increasing or decreasing an angle of protrusion relative to the elongated tubular member based on a degree of elongation or collapse of the elongated tubular member.

16. The stent of claim 12 , wherein in the collapsed configuration the plurality of cells have a first profile and in the expanded configuration the plurality of cells have a second profile different from the first profile, wherein in the first profile a major dimension of the plurality of cells extends along a longitudinal axis of the elongated tubular member.

17. The stent of claim 16 , wherein in the second profile the major dimension of the plurality of cells extends along a circumference of the elongated tubular member.

18. The stent of claim 12 , wherein the plurality of barbs are spaced along a length and a circumference of the elongated tubular member.

19. The stent of claim 12 , wherein each of the plurality of barbs comprises a material combination which behaves like a temperature sensitive bimetallic strip.

20. A stent, the stent comprising:
an elongated tubular member comprising at least one filament interwoven to form define a plurality of cells, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration, wherein in the collapsed configuration the plurality of cells have a first profile and in the expanded configuration the plurality of cells have a second profile different from the first profile; and
a plurality of barbs fixed to the at least one filament defining the plurality of cells, each of the plurality of barbs formed from a wire having a first end, a second end, and a middle region extending therebetween, wherein both the first end and the second end are fixed to the at least one filament at spaced apart positions, and the middle region is free of attachment to the elongated tubular member in the expanded configuration;
wherein the middle region of each of the plurality of barbs is configured to be positioned radially inward of and under an adjacent winding of the at least one filament when the elongated tubular member is in the collapsed configuration and to extend radially away from the elongated tubular member when the elongated tubular member is in the expanded configuration;
wherein the spaced apart positions, where the first end and the second end of the wire a

Assignees

• Boston Scient Scimed Inc

Inventors

• Folan Martyn G
• Hynes Martin
• Nolan Damien V
• Connaughton Enda
• MONTAGUE Matthew
• Keating Thomas M
• Walsh Michael

Classifications

• A61F2230/0069

  cylindrical · CPC title

• A61F2002/8483

  Barbs · CPC title

• A61F2/88

  the wire-like elements formed as helical or spiral coils · CPC title

• A61F2/90

  characterised by a net-like or mesh-like structure · CPC title

• A61F2/04

  Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts (A61F2/18, A61F2/20 take precedence; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95) · CPC title