Vascular prosthesis with alternating helical sections

• US 8,348,994 B2
• Filed: 03/09/2007
• Issued: 01/08/2013
• Est. Priority Date: 03/09/2007
• Status: Expired due to Fees

• Current Assignee: NovoStent Corp.
• Original Assignee: NovoStent Corp.
• Inventors: Leopold, Eric W., Martin, Gerald Ray, Hogendijk, Michael, Peckham, John
• Primary Examiner(s): PREBILIC, PAUL B
• Application Number:
  US11/716,472
• Publication Number:
  US 20080221663A1
• Time in Patent Office: 2,132 Days
• Field of Search: 623/1.22, 623/1.16
• US Class Current: 623/1.22
• 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 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded

Abstract

An implantable vascular prosthesis is provided for use in a wide range of applications wherein at least first and second helical sections having alternating directions of rotation are coupled to one another. The prosthesis is configured to conform to a vessel wall without substantially remodeling the vessel, and permits accurate deployment in a vessel without shifting or foreshortening.

Claims

1. A vascular prosthesis for implantation in a body vessel having a vessel wall, the vascular prosthesis placeable in radially contracted and expanded states, the vascular prosthesis comprising:

an alternating helical section comprising first and second helical portions;

the first helical portion having a direction of rotation about a longitudinal axis of the prosthesis opposite to that of the second helical portion;

the first and second helical portions having adjacent ends joined directly to one another to define a first apex;

each of the first and second helical portions comprising a widened flange portion adjacent to the first apex;

the widened flange portions extending into a space between the first and second helical portions;

the widened flange portions separated from one another by a gap; and

the widened flange portions being configured to overlap a portion of the apex during at least a portion of a treatment range between the radially contracted and expanded states.

2. The vascular prosthesis of claim 1, wherein the alternating helical section includes an even number of helical portions having a first direction of rotation and an even number of helical portions having a second direction of rotation, wherein the helical portions define an odd number of apices.

3. The vascular prosthesis of claim 1, wherein the alternating helical section includes an even number of helical portions having a first direction of rotation and an odd number of helical portions having a second direction of rotation, wherein the helical portions define an even number of apices.

4. The vascular prosthesis of claim 1, wherein the flanges have straight edges.

5. The vascular prosthesis of claim 1, wherein the flanges have zig-zagged edges.

6. The vascular prosthesis of claim 1, wherein at least one helical portion is a helical mesh.

7. The vascular prosthesis of claim 6, wherein the helical mesh defines a plurality of elongate apertures.

8. The vascular prosthesis of claim 7, wherein a plurality of the elongate apertures extend from a first apex to a second apex.

9. The vascular prosthesis of claim 1, further comprising a therapeutic agent disposed on or in a portion of the alternating helical section.

10. The vascular prosthesis of claim 1, further comprising a polymer disposed on or in a portion of the alternating helical section.

11. The vascular prosthesis of claim 10, wherein the polymer is configured to elute a therapeutic agent.

12. The vascular prosthesis of claim 10, wherein the polymer is disposed on the entire alternating helical section.

13. The vascular prosthesis of claim 1, wherein the alternating helical section comprises a shape memory material.

14. The vascular prosthesis of claim 13, wherein the shape memory material is a nickel titanium alloy.

15. The vascular prosthesis of claim 1, further comprising a radially expanding anchor section joined to a first end of the alternating helical section.

16. The vascular prosthesis of claim 15, further comprising a second radially expanding anchor section joined to a second end of the alternating helical section.

17. The vascular prosthesis of claim 16, wherein the alternating helical section, the first anchor section and the second 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, first anchor section and second anchor section are configured to engage the vessel wall.

18. The vascular prosthesis of claim 15, wherein the alternating helical section and the anchor section are separately formed and then coupled together.

19. The vascular prosthesis of claim 15, wherein the alternating helical section and the anchor section are integrally formed.

20. The vascular prosthesis of claim 1, wherein the first apex has first and second circumferentially separated ends, the widened flange portions located at the first end;

and

the overlapped portion of the apex located at the second end.