Stent

Patent metadata

Field	Value
Publication number	US-11890212-B2
Application number	US-202117412428-A
Country	US
Kind code	B2
Filing date	Aug 26, 2021
Priority date	Apr 9, 2018
Publication date	Feb 6, 2024
Grant date	Feb 6, 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 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 a single knitted filament having a plurality of twisted knit stitches with intermediate rung portions extending between adjacent twisted knit stitches, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration;
wherein the plurality of twisted knit stitches each include a loop portion and an overlapping base region;
wherein in the collapsed configuration the intermediate rung portions have a first length and in the expanded configuration the intermediate rung portions have a second length greater than the first length.

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 at least some of the plurality of twisted knit stitches are each suspended from an intermediate rung portion of a preceding row.

4. The stent of claim 1 , wherein the elongated tubular member includes a first portion having a first knit pattern and a second portion having a second knit pattern different from the first knit pattern.

5. The stent of claim 4 , wherein the second portion is formed of one or more rows of the knitted filament having the plurality of twisted knit stitches.

6. The stent of claim 5 , wherein the first portion is formed of one or more rows of the knitted filament having a stockinette stitch pattern.

7. A stent, the stent comprising:
an elongated tubular member comprising a knitted filament, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration;
wherein the elongated tubular member includes a first portion having a first knit pattern and a second portion having a second knit pattern different from the first knit pattern;
wherein the second portion is formed of one or more rows of the knitted filament having a plurality of twisted knit stitches with intermediate rung portions extending between adjacent twisted knit stitches, wherein the plurality of twisted knit stitches each include a loop portion and an overlapping base region;
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.

8. The stent of claim 7 , wherein the second portion has a lower radial force in the expanded configuration than the first portion.

9. 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.

10. The stent of claim 7 , wherein at least some of the plurality of twisted knit stitches are each suspended from a twisted knit stitch in a preceding row.

11. The stent of claim 7 , wherein the first portion is formed of one or more rows of the knitted filament having a stockinette stitch pattern.

12. The stent of claim 7 , wherein the elongate tubular member is formed from a single filament interwoven with itself.

13. A stent, the stent comprising:
an elongated tubular member comprising a knitted filament, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration;
wherein the elongated tubular member includes a first portion having a first knit pattern and a second portion having a second knit pattern different from the first knit pattern;
wherein the first portion is formed of one or more rows of the knitted filament having a plurality of open loops with intermediate rung portions extending between adjacent open loops;
wherein the second portion is formed of one or more rows of the knitted filament having a plurality of twisted knit stitches with intermediate rung portions extending between adjacent twisted knit stitches;
wherein a length of the intermediate rung portions of the second portion in the collapsed configuration is less than a length of the intermediate rung portions of the second portion in the expanded configuration.

14. The stent of claim 13 , wherein at least some of the plurality of twisted knit stitches are each suspended from a twisted knit stitch in a preceding row.

15. The stent of claim 13 , wherein the plurality of twisted knit stitches each include a loop portion and an overlapping base region.

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

• A61F2/90 Primary

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

• A61F2/86

  Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure · CPC title

• A61F2/88 Primary

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

• A61F2002/045

  Stomach, intestines · CPC title