Patent ID: 8911492

Claim:
An apparatus comprising: a frame expandable from a first diameter to a second diameter wherein the frame has an inner surface and an outer surface, the distance between the surfaces defining the wall thickness of the frame; a plurality of structural features disposed along the frame; and a plurality of polymer anti-thrombotic conjugate particles situated with the plurality of structural features, wherein the anti-thrombotic conjugate comprises a biocompatible, bioabsorbable, hydrophobic polymer backbone having hydrophilic, antithrombotic end groups configured as an amphiphilic structure, the material having the following structure: wherein n is an integer of 2-1000; and m is an integer of 100 to 5000; LA is repeating unit of lactic acid; SA is succinic acid; Hp is unmodified heparin conjugated to the material, the lactic acid, the succinic acid and the unmodified heparin form an integral part of the amphiphilic material the overall structure being comb-like in shape.