Medical devices including metallic films and methods for making same

• US 20060142851A1
• Filed: 12/29/2004
• Published: 06/29/2006
• 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
• Granted Patent: US 8,992,592 B2
• Time in Patent Office: Days
• US Class Current: 623/1.440
• 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 tubular framework; and

a metallic film having a thickness of about 50 μ

m or less and disposed internally of the tubular framework.

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

3. The endoprosthesis of claim 1, wherein the tubular framework has an internal surface and wherein the metallic film is generally tubular in shape and has an outer surface that contacts the internal surface of the tubular framework.

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

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

6. 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.

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

8. The endoprosthesis of claim 1, comprising a second tubular framework, the metallic film being sandwiched between the tubular framework and the second tubular framework.

9. The endoprosthesis of claim 8, wherein the endoprosthesis is self expanding.

10. The endoprosthesis of claim 8, wherein neither the tubular framework nor the second tubular framework, by itself, exerts a radial force sufficient to secure the endoprosthesis within a body passage.

11. The endoprosthesis of claim 10, wherein, when in a deployed state, the tubular framework and the second tubular framework each exerts a radial force, the radial force of the second tubular framework being greater than the radial force of the tubular framework.

12. The endoprosthesis of claim 8, wherein the metallic film comprises a super-elastic alloy comprising titanium and nickel, the super-elastic alloy not being shape set.

13. The endoprosthesis of claim 8, wherein a total radial thickness of the tubular framework and the second tubular framework is about 75 microns or less.

14. The endoprosthesis of claim 8, wherein the tubular framework and the second tubular framework have at least some relative freedom of movement along at least one of the radial, circumferential, and longitudinal dimensions.

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

16. The endoprosthesis of claim 15, wherein the entire metallic film is a single layer.

17. A self-expanding endoprosthesis for deployment within a body passage, comprising:

a first tubular framework;

a tubular member disposed around the first tubular framework; and

a second tubular framework disposed around the tubular member.

18. The self-expanding endoprosthesis of claim 17, wherein neither of the first and second tubular frameworks alone exerts sufficient outward radial force to self-expand the endoprosthesis within a body passage but the first and second tubular frameworks together exert sufficient outward radial force to self-expand the endoprosthesis.

19. The self-expanding endoprosthesis of claim 17, wherein the tubular member is a deposited metallic film comprising titanium and nickel and having a thickness of about 50 μ

m or less.

20. A delivery device for deploying an endoprosthesis within a body passage, comprising:

an elongate inner member;

a self-expanding endoprosthesis disposed about a distal portion of the inner member, the endoprosthesis comprising a tubular framework disposed about a deposited metallic film; and

an outer sheath surrounding the elongate inner member and the self-expanding endoprosthesis, wherein the tubular framework prevents substantial frictional contact between the tubular member and the outer sheath.