Medical devices including metallic films and methods for making same

• US 20050197690A1
• Filed: 12/29/2004
• Published: 09/08/2005
• Est. Priority Date: 03/02/2004
• 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., Peckham, John, Obara, Robert Z., Porter, Stephen Christopher, Leynov, Alexander, Hui, Delilah Yin
• Granted Patent: US 8,998,973 B2
• Time in Patent Office: Days
• US Class Current: 623/1.13
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/86 Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2002/9665 with additional retaining means
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2250/0039 differing in diameter

Abstract

An endoprosthesis for deployment within a body passage includes a framework and a metallic film, which can circumferentially surround the framework or be surrounded by the framework. The framework and metallic film can be attached without using a third material, e.g., without sewing. The framework can define a circumferential recess along at least a portion of its length and circumference. The recess accommodates at least a portion of the metallic film therein.

Claims

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

a framework having first end and second ends; and

a tubular member comprising a metallic film having a thickness of about 50 μ

m or less and being generally coextensive with at least a portion of the framework, the framework and tubular member retained with respect to one another, when deployed in the body passage, at substantially only one distance from the first end of the framework.

2. The endoprosthesis of claim 1, wherein, when deployed in the body passage, the framework has a length and the framework and the tubular member are secured to one another at one or more different locations, each location spaced a respective distance d_i from the first end of the framework, a ratio of (a) a maximum difference between distances d_i to (b) the length of the framework being about 0.15 or less.

3. The endoprosthesis of claim 2, wherein the framework and tubular member are secured to one another at a single location.

4. The endoprosthesis of claim 2, wherein each of the one or more different locations is located closer to the first end of the framework than to the second end.

5. A delivery device comprising the endoprosthesis of claim 1, the delivery device having a distal end and a proximal portion, wherein the endoprosthesis is in the compressed state and the first end of the framework is located closer to the distal end of the delivery device than to the proximal portion.

6. The delivery device of claim 5, wherein, prior to deployment in the body passage, the framework and the tubular member are secured to one another at one or more proximal locations.

7. The endoprosthesis of claim 1, wherein the tubular member includes a deposited metallic film comprising nickel and titanium, the metallic film having a thickness of less than 50 μ

m.

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

a framework comprising at least one radial projection having a radially enlarged end; and

a deposited film generally coextensive with at least a portion of the framework, the film comprising deposited nickel and titanium and having at least one fenestration, the at least one projection of the framework extends through the fenestration and retains a portion of the deposited film adjacent the fenestration between the radially enlarged end and the framework.

9. The endoprosthesis of claim 8, wherein the deposited film and the framework have at least some freedom of movement in at least one of a radial, circumferential, or longitudinal dimension.

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

a framework having at least one framework member; and

a deposited film generally coextensive with at least a portion of the framework, the film comprising deposited nickel and titanium and having a first projection having a fixed end and a plurality of free edges, the first projection extending from its fixed end across the framework member to retain the framework and film with respect to one another.

11. The endoprosthesis of claim 10, wherein the deposited film has a thickness of about 50 μ

m or less.

12. The endoprosthesis of claim 10, wherein the film includes a second projection having a fixed end and a plurality of free edges, the fixed ends of the first and second projections being located on opposite sides of the framework member so that the first and second projections extend over the framework member in opposite orientations.

13. The endoprosthesis of claim 12, wherein a spacing between nearest free edges of the first and second projections is about equal to or less than a width of the projections.

14. The endoprosthesis of claim 10, wherein the endprosthesis and the framework member have a respective longitudinal axis, the longitudinal axes being aligned with one another.

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

a framework defining a perimeter; and

a deposited film generally coextensive with at least a portion of the framework, the film comprising deposited nickel and titanium and having a plurality of projections, each projection having a fixed end and a free end, each projection extending from its fixed end located on a first side of the perimeter to a free end located on a second, opposite side of the perimeter to retain the framework and the film with respect to one another.

16. The endoprosthesis of claim 15, wherein the deposited film has a thickness of about 50 μ

m or less.

17. The endoprosthesis of claim 15, wherein the projections extend longitudinally outward from an end of the film.

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

a framework having first and second end portions and a central portion, the central portion and at least the first end portion having a diameter that differs by an amount Δ

d to form a recess; and

a tubular member circumferentially coextensive with at least the central portion of the framework and at least partially accommodated within the recess.

19. The endoprosthesis of claim 18, wherein the central portion has a smaller diameter than the first end portion so that the recess is formed within an exterior of the framework.

20. The endoprosthesis of claim 18, wherein the tubular member comprises a deposited metallic film comprising nickel and titanium.