Patent ID: 8109913

Claim:
A medical device to deliver an active component at a treatment site of a patient comprising: a coil which includes a wire having a distal end and a proximal end, the wire being wound between the distal and proximal ends thereof such that windings of the wire form the coil; a coil lumen defined by the windings of the wound wire between the distal and proximal ends thereof; polymeric micro-particles filling the coil lumen between the distal and proximal ends thereof; and an active component contained within the polymeric microparticles; and end caps closing the micro-particle filled coil lumen at the distal and proximal ends of the wound wire, wherein the micro-particles have a diameter which is sufficiently small so as to be filled within the coil lumen yet sufficiently large so as to prevent the micro-particles from leaking from the coil lumen through the windings of the wire, and wherein the active component is capable of being controllably released from the polymeric micro-particles and through the windings of the wire for delivery at the treatment site.