Medical devices including metallic films

• US 8,992,592 B2
• Filed: 12/29/2004
• Issued: 03/31/2015
• Est. Priority Date: 12/29/2004
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Molaei, Masoud, Peckham, John
• Primary Examiner(s): ANDERSON, GREGORY A
• Application Number:
  US11/025,464
• Publication Number:
  US 20060142851A1
• Time in Patent Office: 3,744 Days
• Field of Search: 623/1.13, 623/1.15, 623/1.34, 623/1.42, 623 144- 146, 623/1.14
• 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 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/30329 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2002/823 Stents, different from stent-grafts, adapted to cover an aneurysm
• CPC Class Codes: A61F 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0041 using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0054 V-shaped

Abstract

An endoprosthesis for deployment within a body passage includes an external tubular framework disposed about a tubular member, e.g., a metallic film having a thickness of about 50 μm or less. The tubular member may be sandwiched between the external tubular framework and an internal tubular framework located internally of the external tubular framework and the tubular member. Whether or not the internal tubular framework is included, the endoprosthesis can be self-expanding. During deployment of the endoprosthesis using a deployment device, the external tubular framework prevents substantial frictional contact between the deployment device and the tubular member.

Claims

1. An endoprosthesis for deployment within a body passage, comprising:

a framework having fenestrations; and

a tubular member having fenestrations that are smaller than the fenestrations in the framework, the tubular member comprising a metallic film having a thickness of about 50 μ

m or less, wherein the framework and the tubular member are secured to one another by a plurality of filaments that pass through the fenestrations, and can move relative to one another longitudinally, circumferentially and radially.

2. The endoprosthesis of claim 1, wherein the endoprosthesis is self-expandable.

3. The endoprosthesis of claim 1, wherein the metallic film comprises a super-elastic alloy of nickel and titanium.

4. The endoprosthesis of claim 1, wherein the endoprosthesis, when deployed within a body passage, exerts an outward radial force against the body passage, essentially all of the outward radial force resulting from the framework.

5. The endoprosthesis of claim 4, wherein the tubular member exerts an additional outward radial force against the body passage.

6. The endoprosthesis of claim 5, wherein the tubular member is a deposited metallic film of a memory alloy that is shape set to a larger diameter than the radially expanded diameter of the framework when deployed.

7. The endoprosthesis of claim 1, wherein the endoprosthesis has an internal surface, the internal surface substantially defined by an internal surface of the metallic film.

8. The endoprosthesis of claim 1, wherein the endoprosthesis comprises only one framework.

9. The endoprosthesis of claim 1, wherein substantially all of the metallic film is a single layer.

10. The endoprosthesis of claim 1, wherein the entire metallic film is a single layer.

11. The endoprosthesis of claim 1, wherein the framework comprises a plurality of circumferential bands connected by longitudinal members, thereby defining the fenestrations of the framework therebetween.

12. The endoprosthesis of claim 1, wherein the metallic film comprises a super-elastic metal alloy.

13. The endoprosthesis of claim 1, wherein the metallic film comprises an alloy of nickel and titanium.

14. The endoprosthesis of claim 13, wherein the alloy additionally comprises chromium.

15. The endoprosthesis of claim 1, wherein the tubular member consists of the metallic film.

16. The endoprosthesis of claim 1, wherein the tubular member is a deposited metallic film.

17. The endoprosthesis of claim 1, wherein the tubular member is a deposited metallic film of nitinol.

18. The endoprosthesis of claim 1, additionally comprising one or more radio-opacity markers.

19. The endoprosthesis of claim 1, wherein the tubular member comprises only a single layer along a radial dimension.

20. The endoprosthesis of claim 1, wherein the metallic film has a thickness of 4-35 μ

m.