Endoprostheses including nickel-titanium alloys
First Claim
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1. An endoprosthesis comprising a generally tubular body adapted to self-expand from a first dimension to a second dimension to support a bodily vessel, the tubular body comprising an alloy comprising nickel and titanium, the alloy further comprising inclusions, wherein the largest inclusion is less than or equal to approximately 7 microns in length.
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Abstract
Self-expanding endoprostheses, such as stents, have good fatigue resistance are disclosed.
39 Citations
24 Claims
- 1. An endoprosthesis comprising a generally tubular body adapted to self-expand from a first dimension to a second dimension to support a bodily vessel, the tubular body comprising an alloy comprising nickel and titanium, the alloy further comprising inclusions, wherein the largest inclusion is less than or equal to approximately 7 microns in length.
- 11. An endoprosthesis comprising a body adapted to self-expand from a first dimension to a second dimension and capable of maintaining the patency of a bodily vessel, the body comprising an alloy comprising from approximately 50.1 atomic percent to approximately 51.5 atomic percent of nickel, and titanium, the alloy further comprising inclusions present in a percent area concentration of less than or equal to approximately 1%, the size of the largest inclusions being less than or equal to approximately 7 microns in length, wherein the tubular body comprises an oxidized layer less than or equal to approximately 100 angstroms.
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13. A method, comprising:
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delivering an endoprosthesis comprising a generally tubular body into a bodily vessel, the tubular body comprising an alloy comprising nickel and titanium, the alloy further comprising inclusions, wherein the size of the largest inclusions is less than or equal to approximately 7 microns in length; and
self-expanding the tubular body to support the bodily vessel. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification