Patent ID: 7998088

Claim:
A guidewire comprising: an elongate shaft having a proximal end and a distal end; an atraumatic tip disposed at the distal end of the shaft; a distal stop comprising polytetrafluoroethylene disposed on the elongate shaft proximal of the atraumatic tip; a proximal stop comprising polytetrafluoroethylene disposed on the elongate shaft proximal of the distal stop; an inner coil disposed about the elongate shaft between the proximal stop and the distal stop; and an outer coil disposed about the elongate shaft and about the inner coil; wherein the inner coil is not fixedly secured directly to the elongate shaft; wherein the outer coil is wound about the elongate shaft in a first direction and the inner coil is wound about the elongate shaft in a second direction, and wherein the first direction is substantially opposite of the second direction.