Stent

Patent metadata

Field	Value
Publication number	US-11266517-B2
Application number	US-201916378272-A
Country	US
Kind code	B2
Filing date	Apr 8, 2019
Priority date	Apr 9, 2018
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

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 configured to move between a collapsed configuration and an expanded configuration. The elongated tubular member may comprise at least one twisted filament, such as a knitted filament having a plurality of twisted knit stitches with intermediate rung portions extending between adjacent twisted knit stitches, or a plurality of helical filaments twisted with a plurality of longitudinal filaments.

First claim

What is claimed is:

1. A stent, the stent comprising:
an elongated tubular member comprising at least one knitted filament having a plurality of twisted knit stitches with intermediate rung portions extending between adjacent twisted knit stitches, each twisted knit stitch including a twisted loop, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration;
wherein in the collapsed configuration the plurality of twisted knit stitches have a first profile and in the expanded configuration the plurality of twisted knit stitches have a second profile different from the first profile;
wherein a length of the intermediate rung portions in the collapsed configuration is less than a length of the intermediate rung portions in the expanded configuration.

2. The stent of claim 1 , wherein at least some of the plurality of twisted knit stitches are each suspended from a twisted knit stitch in a preceding row.

3. The stent of claim 1 , wherein the plurality of twisted knit stitches each include a loop portion and an overlapping base region.

4. The stent of claim 1 , wherein at least some of the plurality of twisted knit stitches are each suspended from an intermediate rung portion of a preceding row.

5. The stent of claim 1 , wherein the elongated tubular member comprises a plurality of rows, wherein some of the plurality of rows have a first number of twisted knit stitches and some of the plurality of rows have a second number of twisted knit stitches less than the first number of twisted knit stitches.

6. The stent of claim 1 , wherein the elongated tubular member has at least a first portion and a second portion, the second portion having a lower radial force in the expanded configuration than the first portion.

7. A stent, the stent comprising:
an elongated tubular member comprising a plurality of knitted rows, each row including a plurality of loops having a loop portion and a twisted base with intermediate rung portions extending between adjacent loops, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration;
wherein at least some of the plurality of loops are each suspended from the twisted base of a loop in a preceding row.

8. The stent of claim 7 , wherein a length of the intermediate rung portions in the collapsed configuration is less than a length of the intermediate rung portions in the expanded configuration.

9. The stent of claim 7 , wherein the elongated tubular member has at least a first portion and a second portion, the second portion having a lower radial force in the expanded configuration than the first portion.

10. The stent of claim 7 , wherein at least some of the plurality of loops are each suspended from an intermediate rung portion of a preceding row.

11. The stent of claim 7 , wherein some of the plurality of rows have a first number of loops and some of the plurality of rows have a second number of loops less than the first number of loops.

12. A stent, the stent comprising:
an elongated knitted tubular member formed of a single filament comprising a plurality of knitted rows, each row including a plurality of loops of the filament having a twisted base portion in which a first segment of the filament crosses a second segment of the filament and a loop portion located between the first segment and the second segment, with intermediate rung portions of the filament extending between adjacent loops, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration, wherein a length of the intermediate rung portions in the collapsed configuration is less than a length of the intermediate rung portions in the expanded configuration.

13. The stent of claim 12 , wherein at least some of the plurality of loops are each suspended from the twisted base portion of a loop in a preceding row.

14. The stent of claim 12 , wherein at least some of the plurality of loops are each suspended from an intermediate rung portion of a preceding row.

15. The stent of claim 12 , wherein some of the plurality of knitted rows have a first number of loops and some of the plurality of knitted rows have a second number of loops less than the first number of loops.

Assignees

• Boston Scient Scimed Inc

Inventors

• Gilmartin Gary
• Folan Martyn G
• Toner Geraldine
• Tierney Paul E
• Collins David

Classifications

• A61F2250/0098

  radio-opaque, e.g. radio-opaque markers · CPC title

• A61F2220/0075

  sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable · CPC title

• A61F2/90 Primary

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

• A61F2210/0014

  using shape memory or superelastic materials, e.g. nitinol · CPC title

• A61F2/844

  folded prior to deployment · CPC title