Vascular prosthesis and methods of use

• US 7,862,608 B2
• Filed: 12/23/2003
• Issued: 01/04/2011
• Est. Priority Date: 12/24/2002
• Status: Expired due to Fees

• Current Assignee: NovoStent Corp.
• Original Assignee: NovoStent Corp.
• Inventors: Hogendijk, Michael, Thompson, Todd
• Primary Examiner(s): Bui; Vy Q
• Application Number:
  US10/746,668
• Publication Number:
  US 20040186556A1
• Time in Patent Office: 2,569 Days
• Field of Search: 623/1.15, 623/1.16, 623/1.22, 623/1.51, 623/1.53, 623/1.54, 606/194, 606/195, 606/198
• US Class Current: 623/1.22
• 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:

first and second coil-shaped helical elements each having distal and proximal ends;

the first and second coil shaped helical elements being ribbon type, coil shaped helical elements, each helical element having a width and a thickness with the width being substantially greater than the thickness;

the first coil-shaped helical element extending more than 360°

about a longitudinal axis of the prosthesis;

the second coil-shaped helical element extending more than 360°

about the longitudinal axis of the prostheses, the second coil-shaped helical element having an opposite direction of rotation to that of the first coil-shaped helical element;

the first and second coil-shaped helical elements arranged in series with the entire first coil-shaped helical element being proximal of the second coil-shaped helical element and with the distal end of the first coil-shaped helical element secured to the proximal end of the second coil-shaped helical element; and

an anchor section securing the distal end of the first coil-shaped helical element to the proximal end of the second coil-shaped helical element, the anchor section comprising a closed band extending 360°

circumferentially.

2. The vascular prosthesis of claim 1, wherein:

the first and second coil-shaped helical elements are self expanding to engage the vessel wall in an expanded state.

3. The vascular prosthesis of claim 1, wherein:

the first and second coil-shaped helical elements are unwindingly self-expanding helical elements to engage the vessel wall in an expanded state.

4. The vascular prosthesis of claim 1, further comprising more than two coil-shaped helical elements arranged in series.

5. The vascular prosthesis of claim 1, wherein the first coil-shaped helical element and second coil-shaped helical element have equal lengths.

6. The vascular prosthesis of claim 1, wherein each of said first and second coil-shaped helical elements comprises a single length of material.

7. The vascular prosthesis of claim 1, wherein the anchor section comprises a radially self-expanding anchor section.

8. The vascular prosthesis of claim 1, wherein the first and second coil-shaped helical elements are configured in a contracted state suitable for transluminal insertion into the body vessel, the first and second coil-shaped helical elements being capable of expanding to engage the vessel wall.

9. The vascular prosthesis of claim 1, further comprising a radially self-expanding anchor section joined to an end of a coil-shaped helical element.

10. The vascular prosthesis of claim 9, wherein the anchor section is configured to engage the vessel wall to retain the vascular prosthesis in position during deployment of the coil-shaped helical elements.

11. The vascular prosthesis of claim 9, wherein the coil-shaped helical elements and the anchor section each comprise a shape memory material.

12. The vascular prosthesis of claim 11, wherein the shape memory material is a nickel titanium alloy.

13. The vascular prosthesis of claim 9, wherein the coil-shaped helical elements and the anchor section are made separately and then coupled together.

14. The vascular prosthesis of claim 1, further comprising a distal, radially self-expanding anchor section joined to the distal end of the second coil-shaped helical element.

15. The vascular prosthesis of claim 14, wherein the distal anchor section is configured to be deployed within the body vessel before the coil-shaped helical elements are deployed.

16. The vascular prosthesis of claim 14, further comprising a proximal, radially self-expanding anchor section joined to the proximal end of the first coil-shaped helical element.

17. The vascular prosthesis of claim 16, wherein the anchor sections each comprise a plurality of elongated elements having a generally zig-zag configuration.