Esophageal stent with valve

Patent metadata

Field	Value
Publication number	US-9713522-B2
Application number	US-201514661562-A
Country	US
Kind code	B2
Filing date	Mar 18, 2015
Priority date	Oct 31, 2011
Publication date	Jul 25, 2017
Grant date	Jul 25, 2017

Abstract

A stent comprised of a valve and a scaffolding structure having components configured to allow at least a portion of the stent to decrease in diameter in response to an axial force applied to the stent. Further, the components and elements of the stent may be configured to balance transverse forces applied to the stent, thus reducing the incidence of infolding.

First claim

The invention claimed is:

1. An implantable device having a generally cylindrical shape, configured to be disposed within a body lumen, the device comprising:
a scaffolding of struts, comprising:
a plurality of annular segments disposed along the circumference of the cylindrical shape, the segments arranged in rows in the longitudinal direction of the cylindrical shape, each annular segment comprising a plurality of interconnected arms;
a plurality of connectors extending between and interconnecting adjacent annular segments;
wherein the annular segments and connectors of the implantable device define a proximal zone adjacent to and extending from a first longitudinal end of the cylindrical shape, a valve zone adjacent to and extending from a second longitudinal end of the cylindrical shape, and a transition zone located between the valve zone and the proximal zone, each zone comprising a plurality of annular segments, wherein the transition zone is more compressible in a transverse direction than the valve zone, and wherein the proximal zone is more compressible in the transverse direction than the transition zone; and

a valve coupled to an inside diameter of the cylindrical shape, the valve disposed within the valve zone.

2. The implantable device of claim 1 , wherein adjacent arms of the plurality of interconnected arms are arranged at acute angles relative to each other.

3. The implantable device of claim 1 , further comprising a plurality of eyelets, elongated in a circumferential direction of the cylindrical shape, the eyelets configured to receive a suture, and the eyelets disposed adjacent a first longitudinal end of the cylindrical shape.

4. The implantable device of claim 1 , further comprising a polymeric cover coupled to the scaffolding of struts.

5. The implantable device of claim 1 , further comprising a plurality of rounded knobs, the knobs elongated in a circumferential direction of the cylindrical shape, and the knobs disposed adjacent a second longitudinal end of the cylindrical shape.

6. The implantable device of claim 1 , wherein a plurality of arms is curved and has an inflection point.

7. The implantable device of claim 1 , wherein one or more connectors comprise an omega-shaped portion.

8. The implantable device of claim 7 , wherein one or more connectors comprise a V-shaped portion.

9. The implantable device of claim 1 , wherein one or more connectors within the valve zone comprise a V-shaped portion.

10. The implantable device of claim 1 , wherein the device is configured with a greater number of connectors per row of annular segments in the valve zone compared to the transition zone, and a greater number of connectors per row of annular segments in the transition zone compared to the proximal zone.

11. The implantable device of claim 10 , wherein two or more adjacent rows of connectors within each zone are circumferentially aligned.

12. The implantable device of claim 11 , wherein a plurality of rows of connectors within the proximal zone are circumferentially aligned with connectors disposed in adjacent rows and one or more rows of connectors within the proximal zone are not circumferentially aligned with one or more adjacent rows of connectors.

13. The implantable device of claim 1 , wherein a plurality of annular segments is configured to reduce in diameter in response to an axial force applied to the implantable device.

14. The implantable device of claim 1 , wherein the device has a longitudinal length from 70 mm to 150 mm.

15. The implantable device of claim 1 , wherein the device has a mid-body diameter of from 12 mm to 25 mm.

16. The implantable device of claim 1 , wherein the angles at which adjacent interconnected arms are joined in the proximal zone are larger than the angles at which adjacent interconnected arms are joined in the transition zone, and wherein the angles at which adjacent interconnected arms are joined in the transition zone are larger than the angles at which adjacent interconnected arms are joined in the valve zone.

17. The implantable device of claim 1 , wherein annular segments of the proximal zone have fewer interconnected arms than annular segments of the transition zone, and wherein annular segments of the transition zone have fewer interconnected arms than annular segments of the valve zone.

18. The implantable device of claim 1 , wherein adjacent annular segments of the proximal zone are interconnected with fewer connectors of the plurality of connectors than adjacent annular segments of the transition zone, and wherein adjacent annular segments of the transition zone are interconnected with fewer connectors of the plurality of connectors than adjacent annular segments of the valve zone.

19. The implantable device of claim 1 , wherein one or more connectors disposed in the proximal zone have a first shape and one or more connectors disposed in the transition zone have a second shape that is different from the first shape, and wherein one or more connectors of the valve zone have a third shape that is different from both of the first shape and second shape.

20. An implantable device comprising:
a scaffolding of struts disposed between a first longitudinal end of the implantable device and a second longitudinal end of the implantable device,
the scaffolding of struts defining a proximal zone adjacent to and extending from the first longitudinal end of the implantable device, a valve zone adjacent to and extending from the second longitudinal end of the implantable device, and a transition zone located between the valve zone and the proximal zone, wherein the transition zone is more compressible in a transverse direction than the valve zone, and wherein the proximal zone is more compressible in the transverse direction than the transition zone, and
a valve coupled to an inside portion of the implantable device, the valve disposed within the valve zone.

Assignees

• Merit Medical Systems Inc

Inventors

• Gill Darla
• Eller Zeke
• Snider Rich
• Clegg Trent

Classifications

• A61F2/07

  Stent-grafts · CPC title

• A61F2/915

  with bands having a meander structure, adjacent bands being connected to each other · CPC title

• A61F2002/044

  Oesophagi or esophagi or gullets · CPC title

• A61F2220/0008

  Fixation appliances for connecting prostheses to the body · CPC title

• A61F2/04 Primary

  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