Stent covered with heterologous tissue

• US 20020151969A1
• Filed: 05/03/2002
• Published: 10/17/2002
• Est. Priority Date: 09/23/1997
• Status: Active Grant

• Current Assignee: Amnis Therapeutics Ltd.
• Original Assignee: Diseno Y Desarrollo Medico SA de CV
• Inventors: Freidberg, Carlos Vonderwalde
• Granted Patent: US 7,108,717 B2
• Time in Patent Office: Days
• US Class Current: 623/1.41
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: Y10S 623/903 Blood vessel

Abstract

A covered stent assembly comprising a tubular, expandable stent having a metallic framework covered with a cylinder of biocompatible, non-thrombogenic expandable material, such as heterologous tissue. In a preferred embodiment, the metallic framework is positioned coaxially within a cylinder of bovine pericardial tissue. A catheter may be used to deliver the stent assembly to a desired region in the lumen of a patient. The metallic framework is then expanded to seat the assembly within the lumen.

Claims

1. A stent assembly for maintaining the patency of a bodily lumen comprising an expandable stent disposed within a cylinder of biocompatible, non-thrombogenic expandable material.

2. The stent assembly of claim 1 wherein the cylinder is formed of heterologous tissue.

3. The stent of claim 1, wherein the heterologous tissue is selected from the group consisting of bovine pericardium, porcine pericardium, and aortic leaflet.

4. The stent of claim 2, wherein the heterologous tissue comprises bovine pericardium with cross-linked collagen.

5. A method for maintaining the patency of a bodily lumen comprising the steps of:

a) mounting a stent comprising a coaxial assembly of a tubular expandable, metallic framework within a cylinder of heterologous tissue on a catheter;

b) advancing the catheter through the bodily lumen until the stent is positioned at a desired location;

c) expanding the stent to anchor it within the bodily lumen; and

d) withdrawing the catheter.

6. A cylinder formed of heterologous tissue configured to fit over an intraluminal stent.

7. The cylinder of claim 6 having a length of about 5 to about 80 mm.

8. The cylinder of claim 6 having a length of about 10 to about 50 mm.

9. The cylinder of claim 6 having a diameter of about 2 to about 6 mm.

10. The cylinder of claim 6 having a diameter of about 2.5 to about 5 mm.