Stents with dual tissue-wall anchoring features

Patent metadata

Field	Value
Publication number	US-10779967-B2
Application number	US-201815939410-A
Country	US
Kind code	B2
Filing date	Mar 29, 2018
Priority date	Mar 30, 2017
Publication date	Sep 22, 2020
Grant date	Sep 22, 2020

Abstract

The present disclosure relates generally to the field of stents for body lumen drainage. In particular, the present disclosure relates to systems and methods for forming a fluid channel between tissue walls of varying thickness using a stent.

First claim

What is claimed is:

1. A stent, comprising:
a stent body formed of a woven filament having a constrained configuration,
the stent body having an expanded configuration with a proximal portion of the body expanded into a proximal retention member, a distal portion expanded into a distal retention member, and a cylindrical saddle region extending between the proximal and distal retention members;
wherein the proximal retention member, distal retention member and cylindrical saddle region define an open interior passage configured to permit flow therethrough; and
wherein the proximal retention member includes first and second flanges separated from each other by a first distance, and the distal retention member includes third and fourth flanges separated from each other by a second distance, the first distance being greater than the second distance;
wherein the first, second, third, and fourth flanges are the same shape.

2. The stent of claim 1 , wherein the second and third flanges are separated by a third distance, the third distance being greater than the first distance.

3. The stent of claim 1 , wherein the first, second, third and fourth flanges comprise planar surfaces extending perpendicular to a circumference of the stent body.

4. The stent of claim 1 , wherein a diameter of the first, second, third and fourth flanges is larger than a diameter of the cylindrical saddle region.

5. The stent of claim 1 , wherein the first and second flanges are configured to contact opposite sides of a first tissue layer, and the third and fourth flanges are configured to contact opposite sides of a second tissue layer.

6. The stent of claim 1 , further comprising a valve disposed within the open interior passage of the stent body.

7. A stent, comprising:
an elongate body having a constrained configuration,
the elongate body having an expanded configuration with a proximal portion of the body expanded into a proximal retention member, a distal portion expanded into a distal retention member, and a cylindrical saddle region extending between the proximal and distal retention members;
the proximal and distal retention members formed of a woven material and the cylindrical saddle region formed of a knitted material;
wherein the proximal retention member, distal retention member and cylindrical saddle region define an open interior passage configured to permit flow therethrough; and
wherein the proximal retention member includes first and second flanges separated from each other by a first distance, and the distal retention member includes third and fourth flanges separated from each other by a second distance, the first distance being greater than the second distance;
wherein the first, second, third, and fourth flanges are the same shape.

8. The stent of claim 7 , wherein the second and third flanges are separated by a third distance, the third distance being greater than the first distance.

9. The stent of claim 7 , wherein the first, second, third and fourth flanges comprise planar surfaces extending perpendicular to a circumference of the elongate body.

10. The stent of claim 7 , wherein a diameter of the first, second, third and fourth flanges is larger than a diameter of the cylindrical saddle region.

11. The stent of claim 7 , wherein the first and second flanges are configured to contact opposite sides of a first tissue layer, and the third and fourth flanges are configured to contact opposite sides of a second tissue layer.

12. The stent of claim 7 , further comprising a valve disposed within the open interior passage of the elongate body.

13. A stent, comprising:
an elongate body having a constrained configuration,
the elongate body having an expanded configuration with a proximal portion of the body expanded into a proximal retention member, a distal portion expanded into a distal retention member, and a cylindrical saddle region extending between the proximal and distal flanges;
the proximal and distal retention members formed of a woven material and the cylindrical saddle region formed of a polymeric material;
wherein the proximal retention member, distal retention member and cylindrical saddle region define an open interior passage configured to permit flow therethrough; and
wherein the proximal retention member includes first and second flanges separated from each other by a first distance, and the distal retention member includes third and fourth flanges separated from each other by a second distance, the first distance being greater than the second distance;
wherein the first, second, third, and fourth flanges are the same shape.

14. The stent of claim 13 , wherein the second and third flanges are separated by a third distance, the third distance being greater than the first distance.

15. The stent of claim 13 , wherein the first, second, third and fourth flanges comprise planar surfaces extending perpendicular to a circumference of the elongate body.

16. The stent of claim 13 , wherein a diameter of the first, second, third and fourth flanges is larger than a diameter of the cylindrical saddle region.

17. The stent of claim 13 , wherein the first and second flanges are configured to contact opposite sides of a first tissue layer, and the third and fourth flanges are configured to contact opposite sides of a second tissue layer.

18. The stent of claim 13 , further comprising a valve disposed within the open interior passage of the stent body.

19. The stent of claim 13 , wherein the cylindrical saddle region includes an internal or external support structure.

20. The stent of claim 13 , wherein the cylindrical saddle region includes one or more corrugated portions.

Assignees

• Boston Scient Scimed Inc

Inventors

• Walsh Michael
• Folan Martyn G
• Moylan Shane
• Keating Thomas M
• Hynes Martin
• Holly Thomas

Classifications

• B33Y70/10

  Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials · CPC title

• A61L2400/06

  Flowable or injectable implant compositions · CPC title

• A61L2300/414

  Growth factors · CPC title

• A61M2202/0403

  Gall; Bile · CPC title

• A61M27/002

  Implant devices for drainage of body fluids from one part of the body to another (intraocular A61F9/00781; middle ear A61F11/202) · CPC title