Patent ID: 8500785

Claim:
A catheter, comprising: a tube comprising a material, the tube having an inner surface and an outer surface; a bumper extending radially from the tube for restricting proximal movement of a stent positioned on the tube and distal to the bumper; a coil at least partially surrounding the tube, wherein: the coil includes a first portion comprising a first material, the coil includes a second portion comprising a second material different from the first material, the first portion of the coil is in the form of a coating that surrounds the second portion of the coil, a portion of the coating being disposed between the second portion and the outer surface of the tube; the coil is proximal to the bumper; the coil defines an uneven outer surface of the catheter including a helical ridge the coil is an open-pitch coil having a space between adjacent windings, and the catheter is configured so that it can be used as an inner catheter in an implantable medical endoprosthesis delivery system; and a coating surrounding at least a portion of the tube and the coil along an axial length of the catheter.