Patent ID: 8118864

Claim:
An endovascular graft system, comprising: a graft body; a frame; and a therapeutic agent loaded within the endovascular graft system for release of the therapeutic agent therein, wherein a secondary structure retains the therapeutic agent relative to the graft body, the secondary structure comprising a tufted material attached to a wall of the graft body such that at least a portion of the tufted material extends through the graft body to expose tufts inside a lumen for flow of blood of the graft body and at least a portion of the tufted material has tufts exposed outside of the graft body as a therapeutic agent reservoir, the portion of the tufted material exposed inside the lumen of the graft body configured to release the therapeutic agent from the reservoir through the tufts into the lumen of the graft body as the blood flows therethrough; wherein the tufted material is configured to radially surround the graft only at a superior or an inferior end, and in a bifurcated graft only to radially surround one or more ends of superior, ipsilateral, and contralateral members defining the bifurcated graft; and wherein the therapeutic agent is an anti-stenosis drug to maintain patency of the lumen of the endovascular graft system.