Vascular prosthesis and methods of use

• US 20040186556A1
• Filed: 12/23/2003
• Published: 09/23/2004
• Est. Priority Date: 12/24/2002
• Status: Active Grant

• Current Assignee: NovoStent Corp.
• Original Assignee: NovoStent Corp.
• Inventors: Hogendijk, Michael, Thompson, Todd
• Granted Patent: US 7,862,608 B2
• Time in Patent Office: Days
• US Class Current: 623/1.16
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2/885 comprising a coil including a plurality of spiral or helical sections with alternate directions around a central axis
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/068 Modifying the blood flow model, e.g. by diffuser or deflector
• CPC Class Codes: A61F 2002/828 Means for connecting a plurality of stents allowing flexibility of the whole structure
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2250/0068 the pharmaceutical product being in a reservoir

Abstract

The present invention is directed to an implantable vascular prosthesis configured for use in a wide range of applications, such as treating aneurysms, maintaining patency in a vessel, and allowing for the controlled delivery of therapeutic agents to a vessel wall. The prosthesis comprises one or more helical sections coupled to one or more anchoring sections having a generally zig-zag or cell-like configuration. The prosthesis is configured to conform to a vessel wall without substantially remodeling the vessel, and further is configured to be precisely deployed in a vessel without shifting or foreshortening during deployment.

Claims

1. A vascular prosthesis for implantation in a body vessel having a vessel wall, the vascular prosthesis comprising:

a helical section comprising a plurality of helical turns and having distal and proximal ends;

a distal anchor section joined to the distal end, the distal anchor section forming a radially self-expanding anchor; and

a proximal anchor section joined to the proximal end, the proximal anchor section forming a radially self-expanding anchor.

2. The vascular prosthesis of claim 1, wherein the helical section, distal anchor section and proximal anchor section each are capable of assuming a contracted state suitable for transluminal insertion into the body vessel and a deployed state wherein the helical section, distal anchor section and proximal anchor section engage the vessel wall.

3. The vascular prosthesis of claim 2, wherein the distal anchor section is configured to be deployed within the body vessel before the helical section and proximal anchor section are deployed.

4. The vascular prosthesis of claim 2, wherein the helical section is configured to be deployed before the proximal anchor section is deployed, but after the distal anchor section is deployed.

5. The vascular prosthesis of claim 2, wherein the distal anchor section is configured to engage the vessel wall to retain the vascular prosthesis in position during deployment of the helical section and proximal anchor section.

6. The vascular prosthesis of claim 1, wherein the helical section, distal anchor section and proximal anchor section each comprise a shape memory material.

7. The vascular prosthesis of claim 6, wherein the shape memory material is a nickel titanium alloy.

8. The vascular prosthesis of claim 1, wherein the helical section, distal anchor section and proximal anchor section are made separately and then coupled together.

9. The vascular prosthesis of claim 1, wherein distal anchor section and proximal anchor section each comprise a plurality of elongated elements having a generally zig-zag configuration.

10. A vascular prosthesis for implantation in a body vessel having a vessel wall, the vascular prosthesis comprising:

a distal helical section comprising a plurality of helical turns and having distal and proximal ends;

a proximal helical section comprising a plurality of helical turns and having distal and proximal ends;

a distal anchor section joined to the distal end of the distal helical section;

a proximal anchor section joined to the proximal end of the proximal helical section; and

a central anchor section that joins the proximal end of the distal helical section with the distal end of the proximal helical section.

11. The vascular prosthesis of claim 10, wherein the helical sections and anchor sections each are capable of assuming a contracted state suitable for transluminal insertion into the body vessel and a deployed state wherein the helical sections and anchor sections engage the vessel wall.

12. The vascular prosthesis of claim 11, wherein the distal anchor section is configured to be deployed within the body vessel before the other sections are deployed.

13. The vascular prosthesis of claim 11, wherein the distal anchor section is configured to engage the vessel wall to retain the vascular prosthesis in position during deployment of the other sections.

14. The vascular prosthesis of claim 10, wherein the helical sections and anchor sections each comprise a shape memory material.

15. The vascular prosthesis of claim 14, wherein the shape memory matrial is a nickel titanium alloy.

16. The vascular prosthesis of claim 10, wherein the helical sections and anchor sections are made separately and then coupled together.

17. The vascular prosthesis of claim 10, wherein the anchor sections each comprise a plurality of elongated elements having a generally zig-zag configuration.