a drug eluted vascular graft where the internal lumen are coated with at least one or more bioerodible polymers capable of releasing at least one or more therapeutic agents in a controlled time - released manner . the therapeutic agent may include an antimicrotubule , an antiproliferative agent , or an antithrombogenic agent . a method for preventing thrombosis of vascular grafts used in vascular access for hemodialysis , vascular reconstruction and coronary bypass grafting .