REDUCING STENT FOR A TRANSJUGULAR INTRAHEPATIC PORTOSYSTEMIC SHUNT

• US 20160296317A1
• Filed: 04/07/2016
• Published: 10/13/2016
• Est. Priority Date: 04/09/2015
• Status: Abandoned Application

• Current Assignee: Oregon Health & Science University
• Original Assignee: Oregon Health & Science University
• Inventors: Timmermans, Hans, Kaufman, John
• Application Number:
  US15/093,521
• Publication Number:
  US 20160296317A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2/94 Stents retaining their form, i.e. not being deformable, after placement in the predetermined place
• CPC Class Codes: A61F 2002/044 Oesophagi or esophagi or gullets
• CPC Class Codes: A61F 2002/068 Modifying the blood flow model, e.g. by diffuser or deflector
• CPC Class Codes: A61F 2002/072 Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2230/001 Figure-8-shaped, e.g. hourglass-shaped
• CPC Class Codes: A61F 2230/0023 triangular
• CPC Class Codes: A61F 2250/001 for adjusting a diameter

Abstract

A stent used in reducing a diameter of a transjugular intrahepatic portosystemic shunt (TIPS) for secondary restriction of flow through a TIPS tract is disclosed. In one example approach, a reducing stent comprises a tube-shaped framework with a tubular material affixed around an outer surface of the framework and extending through the interior of the framework to define a reducing passage in the interior of the framework. In another example approach, a transjugular intrahepatic portosystemic shunt system including a transjugular intrahepatic portosystemic shunt and a reducing stent mounted within an interior of the transjugular intrahepatic portosystemic shunt is disclosed.

Claims

1. A stent used in reducing a diameter of a transjugular intrahepatic portosystemic shunt, the stent comprising:

a tube-shaped framework having a substantially constant diameter along a longitudinal axis of the framework from a first open end to a second open end opposing the first open end;

a tubular material with first and second opposing open ends, where the first end of the tubular material is affixed to a first region around an outer surface of the framework and wherein the tubular material extends from the first region over an edge of the first open end of the framework, through an interior of the framework, and over an edge of the second open end of the framework to terminate at the second end of the tubular material which is affixed to a second region around the outer surface of the tube-shaped framework thereby defining a reducing passage extending through the interior of the tube-shaped framework along the longitudinal axis of the framework, wherein a diameter of the reducing passage in a middle portion of the interior of the framework is less than the diameters of the framework at each of the first and second opposing ends of the framework.

2. The stent of claim 1, wherein the tubular material is sutured to one or more struts of the framework at the first and second regions around the outer surface of the framework.

3. The stent of claim 1, further comprising a plurality of directional barbs affixed to the struts of the framework around the outer surface of the framework.

4. The stent of claim 3, wherein the barbs are affixed to the struts around a central circumference of the stent.

5. The stent of claim 1, wherein the tubular material comprises an expandable, biocompatible material.

6. The stent of claim 5, wherein the tubular material comprises a polytetrafluoroethylene-based material.

7. The stent of claim 1, wherein the tube-shaped framework is collapsible.

8. The stent of claim 1, wherein the diameter of the reducing passage in the middle portion of the interior of the framework is adjustable from a first diameter to a second diameter larger than the first diameter.

9. The stent of claim 8, wherein the first diameter is approximately 3 mm.

10. The stent of claim 8, wherein the second diameter is approximately 5 mm.

11. The stent of claim 1, where the framework has a cross-sectional diameter of approximately 10 mm

12. The stent of claim 1, where the framework has a hexagonal cross-section.

13. The stent of claim 1, where the tube-shaped framework has a substantially circular cross-section.

14. The stent of claim 1, where the first region overlaps the second region.

15. The stent of claim 1, where the first region does not overlap the second region.

16. A transjugular intrahepatic portosystemic shunt system, comprising:

a transjugular intrahepatic portosystemic shunt; and

the stent of claim 1 mounted within an interior of the transjugular intrahepatic portosystemic shunt.