Medical devices and methods of making the same
View Patent ↗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.
1. An endoprosthesis, comprising
a band including a first portion and a second portion:
the first portion having a first width, the first portion having an ASTM E112 G value of about eight or more; and
the second portion having a second width different than the first, wherein the first and second portions have different grain sizes; and
an elongated portion extending from the band.
2. The endoprosthesis of claim 1 , wherein the elongated portion is bent.
3. The endoprosthesis of claim 1 , wherein the second portion has an ASTM E112 G value of about eight or less.
4. The endoprosthesis of claim 1 , wherein the band is wider than the elongated portion.
5. The endoprosthesis of claim 1 , wherein the first portion has a grain size larger than a grain size of the second portion.
6. The endoprosthesis of claim 1 , wherein the first portion has a yield strength lower than a yield strength of the second portion.
7. The endoprosthesis of claim 1 , wherein the first and second portions have different thicknesses.
8. The endoprosthesis of claim 1 , wherein the first and second portions have different yield strengths.
9. 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.
10. 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.
11. 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.
12. An endoprosthesis, comprising:
a band having a first grain size and a band median width; and
an elongated portion extending from the band, the elongated portion having a second grain size smaller than the first grain size and an elongated portion median width different than the band median width.
13. The endoprosthesis of claim 12 , wherein the band median width is larger than the elongated portion median width.
14. The endoprosthesis of claim 12 , wherein the band has an ASTM E112 G value of about eight or less.
15. The endoprosthesis of claim 12 , wherein the elongated portion has an ASTM E112 G value of about eight or more.
16. The endoprosthesis of claim 12 , wherein the band has yield strength lower than a yield strength of the elongated portion.
17. The endoprosthesis of claim 12 , wherein the band and the elongated portion have the same thickness.
18. The endoprosthesis of claim 12 , wherein the band and the elongated portion have different thicknesses.
19. The endoprosthesis of claim 12 , wherein the band and the elongated portion comprise the same composition.
20. The endoprosthesis of claim 12 , wherein the elongated portion is bent.
21. An endoprosthesis, comprising a band including a first portion and a second portion, the first portion having a first width and an ASTM E112 G value of about eight or more, and the second portion having a second width different than the first and an ASTM E112 G value of about eight or less, wherein the first and second portions have different grain sizes.
22. The endoprosthesis of claim 21 , further comprising an elongated portion extending from the band.
23. The endoprosthesis of claim 22 , wherein the elongated portion is bent.
24. The endoprosthesis of claim 22 , wherein the band is wider than the elongated portion.
25. The endoprosthesis of claim 21 , wherein the first portion has a grain size larger than a grain size of the second portion.
26. The endoprosthesis of claim 21 , wherein the first portion has a yield strength lower than a yield strength of the second portion.
27. The endoprosthesis of claim 21 , wherein the first and second portions have different thicknesses.
28. The endoprosthesis of claim 21 , wherein the first and second portions have different yield strengths.
29. The endoprosthesis of claim 21 , 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.
30. The endoprosthesis of claim 21 , 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.
31. The endoprosthesis of claim 21 , 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.