Patent ID: 8267886

Claim:
A catheter comprising: a connector having an inflation channel and a guidewire channel; a shaft joined at a proximal end to the connector and having an inflation lumen that is in fluid communication with the inflation channel, at least one core wire lumen concentrically positioned around the inflation lumen, and a guidewire lumen configured for disposition of a guidewire therein and in fluid communication with the guidewire channel; at least one retractable core wire disposed within the at least one core wire lumen, wherein the at least one retractable core wire has an outer diameter that is smaller than an inner diameter of the at least one lumen into which the core wire is disposed, and wherein the retractable core wire comprises a substantially stiff member having proximal and distal ends and a length defined by the ends that is substantially equal to or less than a length of the core wire lumen; a stem having a stem guidewire lumen portion configured for disposition of the guidewire therein and in fluid communication with the guidewire lumen; a tip having a tip guidewire lumen portion configured for disposition of the guidewire therein and in fluid communication with the stem guidewire lumen portion; and an inflatable balloon positioned substantially around the exterior of the stem, having proximal and distal ends, and that is in fluid communication with the inflation lumen.