Method of coating a stent having variable drug release rate
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United States of America Patent
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Feb 5, 2013
Grant Date -
Jan 13, 2011
app pub date -
Sep 21, 2010
filing date -
Nov 12, 2002
priority date (Note) -
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Abstract
A method of coating a stent may comprise applying a composition including a drug and a polymer to the stent to form a coating. The release rate of the drug from the coating gradually increases along a length of the stent which extends axially from opposite ends of the stent. The variable drug release rate can be accomplished by varying the coating thickness, by applying a barrier region over the drug-containing composition, and/or by having different polymers in the coating, the polymers having different drug permeabilities.
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