METHOD OF COATING A STENT HAVING VARIABLE DRUG RELEASE RATE
First Claim
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1. A method of coating a stent, comprising:
- applying a composition including a drug and a polymer to the stent to form a coating, wherein the release rate of the drug from the coating gradually increases along a length of the stent, the length extending axially from opposite ends of the stent.
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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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5 Claims
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1. A method of coating a stent, comprising:
applying a composition including a drug and a polymer to the stent to form a coating, wherein the release rate of the drug from the coating gradually increases along a length of the stent, the length extending axially from opposite ends of the stent. - View Dependent Claims (2, 3, 4, 5)
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