Surface features of an implantable medical device
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United States of America Patent
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Oct 19, 2004
Grant Date -
N/A
app pub date -
Sep 28, 2000
filing date -
Sep 28, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
An implantable medical device, such as a stent or graft, having asperities on a designated region of its outer surface is disclosed. The asperities can serve to improve retention of one or more layers of a coating on the device and to increase the amount of coating that can be carried by the device. The asperities can be formed by using a stream of pressurized grit to roughen the surface. The asperities can also be formed by removing material from the outer surface, for example, by chemical etching with or without a patterned mask. Alternatively, the asperities can be formed by adding material to the outer surface, for example, by welding powder particles to the outer surface or sputtering.
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