Patent ID: 7811317
Filing Date: 2010-10-12
Classification: A61F,A61L

Abstract:
1. A method for delivery of a therapeutic substance to the interior of a body lumen using a radially expandable intravascular stent, the stent being made by applying to the stent a mixture of a solvent, a polymer dissolved in the solvent and a therapeutic substance dispersed in the solvent, evaporating the solvent to provide a coat of therapeutic substance and polymer on the stent, and repeating the applying and evaporating until a plurality of coats of therapeutic substance and polymer are on the stent, said method for delivery comprising the steps of: introducing the stent and the plurality of coats of therapeutic substance and polymer transluminally into a selected portion of the body lumen; and radially expanding the stent and the plurality of coats of therapeutic substance and polymer into contact with the body lumen such that the plurality of coats of therapeutic substance and polymer are retained on the stent, wherein the ratio of therapeutic substance to polymer in the mixture is in the range of about 10:1 to 1:100.