Medical devices including metallic films and methods for making same

• US 20060142842A1
• Filed: 12/29/2004
• Published: 06/29/2006
• Est. Priority Date: 12/29/2004
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Molaei, Masoud, Correa, Beren W.
• Granted Patent: US 7,901,447 B2
• Time in Patent Office: Days
• US Class Current: 623/1.150
• 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 2002/072 Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61L 31/022 Metals or alloys
• CPC Class Codes: A61L 31/143 Stabilizers
• CPC Class Codes: Y10S 623/901 Method of manufacturing prosthetic device

Abstract

Medical devices, such as endoprostheses, and methods of making the devices are disclosed. The medical device can include a composite cover formed of a deposited metallic film. The cover may include one or more filaments, e.g., wires, which cooperate with the film to provide desirable mechanical properties. The wires may be integrated with the film by depositing the film over the wires.

Claims

1. An endoprosthesis, comprising:

a deposited metallic film defining first and second opposed surfaces and a thickness of less than about 50 μ

m therebetween; and

at least one metal filament, the at least one filament defining a length, at least a portion of the filament along its length being embedded within the metal metallic film between the first and second surfaces.

2. The endoprosthesis of claim 1, wherein the deposited metallic film comprises deposited titanium and nickel.

3. The endoprosthesis of claim 1, wherein the deposited film has a substantially tubular shape defining a longitudinal axis and the at least one filament extends generally along the longitudinal axis.

4. The endoprosthesis of claim 3, wherein the tubular shape of the film defines a length along the longitudinal axis and the length of the filament is at least about 30% of the length of the tubular shape of the film.

5. The endoprosthesis of claim 4, comprising a plurality of filaments each defining a length, at least a portion of each wire along its length being embedded within the metal alloy between the first and second surfaces of the metallic film, each filament extending generally along the longitudinal axis, the length of each filament being at least 30% of the length of the tubular shape of the film.

6. The endoprosthesis of claim 4, wherein at least 75% of the filament along its length is embedded within the metal alloy between the first and second surfaces of the metallic film.

7. The endoprosthesis of claim 4, wherein the filament, along its length, comprises a plurality of embedded portions and at least one non-embedded portion, each embedded portion being embedded within the metal alloy between the first and second surfaces of the metallic film, adjacent embedded portions being spaced apart by a non-embedded portion of the filament.

8. The endoprosthesis of claim 4, wherein the at least one filament comprises an alloy comprising nickel and titanium.

9. The endoprosthesis of claim 8, wherein the metallic film and the at least one filament each have a respective tensile strength, the tensile strength of the filament being greater than the tensile strength of the metallic film.

10. An endoprosthesis, comprising:

a cover comprising at least one deposited metallic film, the cover defining first and second opposed metallic film edges, the first and second opposed metallic film edges each defining a channel; and

at least one filament, the at least one filament extending through the channel of each opposed metallic film edge.

11. The endoprosthesis of claim 10, wherein the deposited metallic film comprises deposited nickel and titanium.

12. The endoprosthesis of claim 10, wherein the cover has a substantially tubular shape defining a longitudinal axis and the at least one filament extends generally parallel to the longitudinal axis.

13. The endoprosthesis of claim 12, wherein the tubular shape defines a length along the longitudinal axis and the length of the filament is at least about 30% of the length of the shape.

14. The endoprosthesis of claim 12, wherein the first and second opposed edges each define at least one offset tab, the channel of each opposed edge being formed by the offset tab.

15. The endoprosthesis of claim 14, wherein the first and second opposed edges each define a plurality of channels, each channel being formed by a respective offset tab, the filament extending through at least some of the channels of each opposed edge.

16. The endoprosthesis of claim 12, wherein endoprosthesis comprises a stent body, at least a portion of the at least one filament and at least a portion of the stent body being secured together.

17. The endoprosthesis of claim 12, wherein the filament defines a longitudinal axis, an engagement between at least one of the channels and the filament restricting movement of the filament along its longitudinal axis with respect to the at least one of the channels.

18. The endoprosthesis of claim 12, wherein the first and second opposed edges are a first pair of opposed edges and metallic film of the cover defines a plurality of pairs of first and second opposed edges, each edge of each pair defining at least one channel, a respective filament extending through the channel of each opposed edge of each pair.

19. The endoprosthesis of claim 18, wherein each pair of opposed edges extends generally along the longitudinal axis and each filament has a length at least about 30% of the length of the tubular shape.

20. The endoprosthesis of claim 19, wherein the first and second edges of each pair of opposed edges have at least some relative freedom of movement with respect to a circumference of the cover.