Covered stents and systems for deploying covered stents

• US 20030074049A1
• Filed: 11/05/2002
• Published: 04/17/2003
• Est. Priority Date: 08/25/2000
• Status: Abandoned Application

• Current Assignee: Kensey Nash Corporation (DSM-Firmenich AG)
• Original Assignee: Kensey Nash Corporation (DSM-Firmenich AG)
• Inventors: Hoganson, David M., Nash, John E.
• Application Number:
  US10/288,676
• Publication Number:
  US 20030074049A1
• Time in Patent Office: Days
• US Class Current: 623/1.13
• 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 2230/0054 V-shaped

Abstract

A covered stent for use in a vessel, duct, lumen or hollow organ of a living being. The covered stent includes a stent or framework of interconnected elongated members in the form of a hollow tube having an inner surface and an outer surface. The stent may be a coiled stent, slotted tube stent, self-expanding stent, or any other intravascular stent design and may be metal or a polymer or a combination. A cover is disposed over a portion of the stent, either on the inside surface, the outside surface or intermediate those surfaces. The cover may be a polymer and may be resorbable. The cover can be attached to the stent by wrapping a sheet of polymer material around the stent, or forming a tube of polymer material and mounting it over the stent. The cover can extend over the entire stent or only a portion of the stent and may include one or more drugs or other beneficial active agents for delivery into the body of the being. Moreover, the cover may have properties to prevent permanent occlusion of a side-branch or bifurcation when placed within a branching or bifurcated vessel and may be constructed to selectively perforate or otherwise provide an opening to allow flow in a side-branch or bifurcated vessel.c

Claims

1. A covered stent for use in the body of a living being, said covered stent comprising a stent and a cover, said stent being an elongated tubular member having a pair of marginal edges and an intermediate portion and comprising plural elongated support portions interconnected with one another to form an open tubular framework, said open tubular framework having an inner surface and an outer surface, said cover being disposed over at least one of said surfaces of said hollow tubular framework and having an opening therein to enable said covered stent to be used in a vessel, duct, lumen or hollow organ of the living being that has a side-branch or bifurcation to another vessel, duct, lumen or hollow organ so that flow of a fluid from the vessel, duct, lumen or hollow organ to the other vessel, duct, lumen or hollow organ is not blocked by said cover.

2. The covered stent of claim 1 wherein said opening is disposed over plural elongated support portions of said framework.

3. The covered stent of claim 2 additionally comprising a radio-opaque marker located adjacent said opening.

4. A covered stent for use in the body of a living being, said covered stent comprising a stent and a cover, said stent being an elongated tubular member having a pair of marginal edges and an intermediate portion and comprising plural elongated support portions interconnected with one another to form an open tubular framework, said open tubular framework having an inner surface and an outer surface, said cover being disposed over at least one of said surfaces of said hollow tubular framework and having a penetratable portion to enable an opening to be formed in said penetratable portion to enable said covered stent to be used in a vessel, duct, lumen or hollow organ of the living being that has a side-branch or bifurcation to another vessel, duct, lumen or hollow organ so that flow of a fluid from the vessel, duct, lumen or hollow organ to the other vessel, duct, lumen or hollow organ is not blocked by said cover.

5. A covered stent for placement in a vessel, duct, lumen or hollow organ of a living being, said covered stent comprising a stent and a cover and at least two biologically active agents, said stent being an elongated tubular member having a pair of marginal edges and an intermediate portion and comprising plural elongated support portions interconnected with one another to form an open tubular framework, said open tubular framework having an inner surface and an outer surface, said cover being disposed over at least one of said surfaces of said hollow tubular framework, said cover comprising plural layers and having an outer surface, an inner surface and at least one intermediate surface, at least one of said biologically active agents being located on either or both of said exterior and interior surface, at least another of said at least two biologically active agents being located on said intermediate surface.

6. The covered stent of claim 5 wherein said plural layers of said cover are in the form of a sheet of material which has been rolled up to forms said plural layers.

7. The covered stent of claim 5 additionally comprising means to hold said plural layers together.

8. The covered stent of claim 5 wherein said cover is resorbable.

9. A system for deploying a stent within a vessel, duct, lumen or hollow organ in the body of a living being, the stent comprising a hollow expandable tubular member having a pair of marginal ends and an intermediate portion, said system comprising an inflatable balloon, said balloon being generally cylindrical in shape and having a distal end portion, and intermediate portion, and a proximal end portion, said balloon being arranged to support the stent thereon with the stent'"'"'s end portion being located over said distal and proximal end portions of said balloon, and with the stent'"'"'s intermediate portion being located over said intermediate portion of said balloon, said intermediate portion of said balloon being of greater diameter when inflated than said distal and proximal end portions of said balloon.

10. In combination an inflatable balloon and a stent, said stent comprising a hollow expandable tubular member having a pair of marginal ends and an intermediate portion, said balloon being generally cylindrical in shape and having a first portion and a second portion, said balloon being arranged to support said stent thereon with one portion of said stent being located over said first portion of said balloon, and with another portion of said stent being located over said second portion of said balloon, said first portion of said balloon being of greater diameter when inflated than said second portion of said balloon.