Medical devices and methods of making the same

• US 7,749,264 B2
• Filed: 01/23/2008
• Issued: 07/06/2010
• Est. Priority Date: 10/08/2004
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Stinson, Jonathan S., Gregorich, Daniel J.
• Primary Examiner(s): GHERBI, SUZETTE JAIME J
• Application Number:
  US12/018,586
• Publication Number:
  US 20080114449A1
• Time in Patent Office: 895 Days
• Field of Search: 623 111- 148, 606/194, 606/198
• US Class Current: 623/1.15
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61F 2/3094 Designing or manufacturing processes
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/3662 Femoral shafts
• CPC Class Codes: A61F 2/3676 Distal or diaphyseal parts of shafts
• 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 2002/30014 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2002/3008 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2002/30113 circular
• CPC Class Codes: A61F 2002/30224 cylindrical
• CPC Class Codes: A61F 2002/30321 differing in roughness
• CPC Class Codes: A61F 2002/30324 differing in thickness
• CPC Class Codes: A61F 2002/3097 using laser
• CPC Class Codes: A61F 2002/3631 with an integral complete or partial peripheral collar or bearing shoulder at its base
• CPC Class Codes: A61F 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0069 cylindrical
• CPC Class Codes: A61F 2240/001 : Designing or manufacturing processes
• CPC Class Codes: A61F 2250/0018 : differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2250/0025 : differing in roughness
• CPC Class Codes: A61F 2250/0036 : differing in thickness
• CPC Class Codes: A61F 2250/0098 : radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2310/00017 : Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: Y10S 623/901 : Method of manufacturing prosthetic device
• CPC Class Codes: Y10T 428/12493 : Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]

Abstract

Medical devices, such as endoprostheses, and methods of making the devices are disclosed. In some embodiments, an endoprosthesis includes a first portion having a first width, and a second portion having a second width different than the first width, wherein the first and second portions have different grain sizes.

Claims

1. An endoprosthesis, comprising a tubular member defined by a plurality of bands and a plurality of connectors that extend between and connect adjacent bands, the tubular member being configured to allow for the bands to be expanded from an initial diameter to a larger diameter during use to maintain the patency of a vessel, wherein a plurality of the bands have a first median grain size and at least one of the connectors has a second median grain size less than the first median grain size.

2. The endoprosthesis of claim 1, wherein the plurality of bands have a median width that is larger than a median width of the at least one connector.

3. The endoprosthesis of claim 1, wherein the plurality of bands have an ASTM E112 G value of about eight or less.

4. The endoprosthesis of claim 3, wherein the at least one connector has an ASTM E112 G value of about eight or more.

5. The endoprosthesis of claim 1, wherein the at least one connector has an ASTM E112 G value of about eight or more.

6. The endoprosthesis of claim 1, wherein the plurality of bands each have a yield strength lower than a yield strength of the at least one connector.

7. The endoprosthesis of claim 1, wherein the plurality of bands and the at least one connector have the same thickness.

8. The endoprosthesis of claim 1, wherein the band and the at least one connector have different thicknesses.

9. The endoprosthesis of claim 1, wherein the band and the at least one connector comprise the same composition.

12. The endoproshesis of claim 1, wherein the at least one connector has a maximum width less than a minimum width of the bands.

13. The endoprosthesis of claim 1, wherein the plurality of bands and the at least one connector comprise a first material selected from the group of stainless steel, a radiopaque element, and an alloy including cobalt and chromium.

14. The endoprosthesis of claim 1, the plurality of bands each include a first portion and a second portion.

15. The endoprosthesis of claim 14, wherein the first and second portions have different yield strengths.

16. The endoprosthesis of claim 14, wherein the first and second portions comprise a first material selected from the group of stainless steel, a radiopaque element, and an alloy including cobalt and chromium.

17. The endoprosthesis of claim 14, wherein the first portion is wider than the second portion, and the first portion has a grain size larger than a grain size of the second portion.

18. The endoprosthesis of claim 14, wherein the first portion has a yield strength lower than a yield strength of the second portion, and the first width is larger than the second width.

10. An endoprosthesis, comprising:

a plurality of bands having a first median grain size; and

at least one connector extending between and connecting at least two adjacent bands of the plurality of bands, the at least one connector having a second median grain size less than the first median grain, wherein the at least one connector is bent.

11. An endoprosthesis, comprising:

a plurality of bands having a first median grain size, wherein the plurality of bands each include a plurality of connected polygons; and

at least one connector extending between and connecting at least two adjacent bands of the plurality of bands, the at least one connector having a second median grain size less than the first median grain size.