Medical devices and methods of making the same

• US 20060079953A1
• Filed: 10/08/2004
• Published: 04/13/2006
• Est. Priority Date: 10/08/2004
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Stinson, Jonathan S., Gregorich, Daniel J.
• Granted Patent: US 7,344,560 B2
• Time in Patent Office: Days
• US Class Current: 623/1.150
• 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 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.

2. The endoprosthesis of claim 1, comprising a band including the first portion.

3. The endoprosthesis of claim 2, wherein the band has an ASTM E112 G value of about eight or more.

4. The endoprosthesis of claim 3, comprising an elongated portion extending from the band, the elongated portion comprising the second portion.

5. The endoprosthesis of claim 4, wherein the elongated portion is bent.

6. The endoprosthesis of claim 4, wherein the elongated portion has an ASTM E112 G value of about eight or less.

7. The endoprosthesis of claim 4, wherein the band is wider than the elongated portion.

8. The endoprosthesis of claim 6, wherein the band has a grain size larger than a grain size of the elongated portion.

9. The endoprosthesis of claim 6, wherein the band has a yield strength lower than a yield strength of the elongated portion.

10. The endoprosthesis of claim 1, wherein the first and second portions have different thicknesses.

11. The endoprosthesis of claim 1, wherein the first and second portions have different yield strengths.

12. The endoprosthesis of claim 1, 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.

13. The endoprosthesis of claim 1, 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.

14. The endoprosthesis of claim 1, wherein the first and second portions have different yield strengths.

15. The endoprosthesis of claim 1, 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.

16. The endoprosthesis of claim 1, comprising a band including the first portion and the second portion.

17. An endoprosthesis, comprising:

a band having a first grain size; and

an elongated portion extending from the band, the elongated portion having a second grain size different than the first grain size.

18. The endoprosthesis of claim 17, wherein the first grain size is larger than the second grain size.

19. The endoprosthesis of claim 17, wherein the band has a width larger than a width of the elongated portion.

20. The endoprosthesis of claim 17, wherein the band has an ASTM E112 G value of about eight or less.

21. The endoprosthesis of claim 17, wherein the elongated portion has an ASTM E112 G value of about eight or more.

22. The endoprosthesis of claim 17, wherein the band has yield strength lower than a yield strength of the elongated portion.

23. The endoprosthesis of claim 17, wherein the band and the elongated portion have the same thickness.

24. The endoprosthesis of claim 17, wherein the band and the elongated portion have different thicknesses.

25. The endoprosthesis of claim 17, wherein the band and the elongated portion comprise the same composition.

26. The endoprosthesis of claim 17, wherein the elongated portion is bent.

27. An endoprosthesis, comprising:

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 yield strengths.

28. The endoprosthesis of claim 27, comprising a band including the first portion, and an elongated portion extending from the band and including the second portion, wherein the band has a yield strength lower than a yield strength of the elongated portion.

29. The endoprosthesis of claim 28, wherein the first width is larger than the second width.

30. The endoprosthesis of claim 27, wherein the first and second portions have different thicknesses.

31. The endoprosthesis of claim 27, wherein the first and second portions comprise the same composition.

32. The endoprosthesis of claim 27, comprising a band including the first portion and second portion.

33. A method of making an endoprosthesis, comprising:

forming a first portion of the endoprosthesis to have a first grain size; and

forming a second portion of the endoprosthesis to have a second grain size different than the first grain size.

34. The method of claim 33, further comprising masking the endoprosthesis.

35. The method of claim 33, further comprising contacting the endoprosthesis with a laser beam.

36. The method of claim 33, comprising subjecting the first and second portions to different heat treatments.

37. The method of claim 33, wherein

the endoprosthesis comprises a band having the first portion, and an elongated portion extending from the band and having the second portion,

the first grain size is larger than the second grain size, and

the first portion has yield strength lower than a yield strength of the second portion.

38. A method of making an endoprosthesis, comprising:

forming a first portion of the endoprosthesis to have a first yield strength; and

forming a second portion of the endoprosthesis to have a second yield strength different than the first yield strength.

39. The method of claim 38, further comprising masking the endoprosthesis.

40. The method of claim 38, further comprising contacting the endoprosthesis with a laser beam.

41. The method of claim 38, comprising subjecting the first and second portions to different heat treatments.

42. The method of claim 38, wherein

the endoprosthesis comprises a band having the first portion, and an elongated portion extending from the band and having the second portion, and

the first yield strength is less than the second yield strength.