Stent

Patent metadata

Field	Value
Publication number	US-12419765-B2
Application number	US-202418639404-A
Country	US
Kind code	B2
Filing date	Apr 18, 2024
Priority date	Apr 9, 2018
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

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 having a longitudinal axis and configured to move between a collapsed configuration and a radially expanded configuration, the elongated tubular member comprising a plurality of rows, wherein each row of the plurality of rows includes a plurality of twisted knit stitches each including a loop with an overlapping base portion and a plurality of rung portions separating adjacent loops;
wherein at least some loops are connected to the overlapping base portion of a longitudinally adjacent loop; and
wherein one or more of the plurality of rows includes a different number of twisted knit stitches than another one of the plurality of rows.

2. A stent, the stent comprising:
an elongated tubular member having a longitudinal axis and configured to move between a collapsed configuration and a radially expanded configuration, the elongated tubular member comprising a plurality of twisted knit stitches each including a loop with an overlapping base portion, wherein at least some loops are connected to the overlapping base portion of a longitudinally adjacent loop; and
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 has a lower radial force in the radially expanded configuration than the first portion.

3. The stent of claim 2 , wherein the elongated tubular member is formed from a single filament interwoven with itself to form the plurality of twisted knit stitches.

4. The stent of claim 3 , wherein the single filament further forms a plurality of circumferentially extending rung portions each positioned between adjacent loops.

5. The stent of claim 4 , wherein at least some loops are connected to a longitudinally adjacent rung portion.

6. The stent of claim 4 , wherein a length of the rung portions in the collapsed configuration is less than the length of the rung portions in the radially expanded configuration.

7. The stent of claim 2 , wherein the first portion includes a first number of twisted knit stitches and the second portion includes a second number of twisted knit stitches, wherein the first number is larger than the second number.

8. The stent of claim 2 , wherein the plurality of twisted knit stitches form a plurality of circumferential rows and a plurality of longitudinal columns, wherein in the first portion, a twisted knit stitch is positioned in every column of every row, and in the second portion, a twisted knit stitch is positioned in half of the columns of every row.

9. The stent of claim 8 , wherein in the second portion, the twisted knit stitches in longitudinally adjacent rows are positioned in alternating columns.

10. The stent of claim 8 , wherein in the second portion, the twisted knit stitches in longitudinally adjacent rows are positioned in the same column.

11. A stent, the stent comprising:
an elongated tubular member having a longitudinal axis and configured to move between a collapsed configuration and a radially expanded configuration, the elongated tubular member comprising a plurality of twisted knit stitches each including a loop with an overlapping base portion, and a plurality of rung portions separating adjacent loops; and
wherein at least some loops are connected to the overlapping base portion of a longitudinally adjacent loop, and at least some loops are connected to a longitudinally adjacent rung portion.

12. The stent of claim 11 , wherein a length of the rung portions in the collapsed configuration is less than the length of the rung portions in the radially expanded configuration.

13. The stent of claim 11 , wherein the elongated tubular member is formed from a single filament interwoven with itself to form the plurality of twisted knit stitches and rung portions.

14. The stent of claim 11 , 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.

15. The stent of claim 14 , wherein the second portion has a lower radial force in the radially expanded configuration than the first portion.

16. The stent of claim 15 , wherein the first portion includes a first number of twisted knit stitches and the second portion includes a second number of twisted knit stitches, wherein the first number is larger than the second number.

17. The stent of claim 15 , wherein the plurality of twisted knit stitches form a plurality of circumferential rows and a plurality of longitudinal columns, wherein in the first portion, a twisted knit stitch is positioned in every column of every row, and in the second portion, a twisted knit stitch is positioned in half of the columns of every row.

18. The stent of claim 17 , wherein in the second portion, the twisted knit stitches in longitudinally adjacent rows are positioned in alternating columns.

19. The stent of claim 17 , wherein in the second portion, the twisted knit stitches in longitudinally adjacent rows are positioned in the same column.

20. The stent of claim 11 , wherein in the collapsed configuration the plurality of twisted knit stitches have a first profile and in the radially expanded configuration the plurality of twisted knit stitches have a second profile different from the first profile.

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

• A61F2250/0012

  for adjusting elasticity, flexibility, spring rate or mechanical tension · CPC title

• A61F2250/001

  for adjusting a diameter · CPC title

• A61F2250/0007

  for adjusting length · CPC title

• A61F2002/045

  Stomach, intestines · CPC title