STENTS WITH DRUG RESERVOIR LAYER AND METHODS OF MAKING AND USING THE SAME
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United States of America Patent
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Issued Date -
Oct 9, 2008
app pub date -
Apr 6, 2007
filing date -
Apr 6, 2007
priority date (Note) -
Abandoned
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Abstract
A method of making drug eluting stents comprises forming ceramic surface coatings of two or more levels of porosity on a stent body. The less porous coating is more conducive to endothelial cell growth, while the more porous coating is better suited for storing and releasing drugs. The surface coatings of different porosities can be produced by coating stent body surface of differing roughness with coatings made by sol-gel method. Differing roughness of the stent body surface can be produced by selective etching of the stent body surface.
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