Patent ID: 8267872

Claim:
A guide wire comprising a proximal portion and a distal tip portion, the guide wire further comprising: a core wire having a proximal end and a distal end having a distal end surface; a multi-filament bundle disposed at the distal end of the core wire, the multi-filament bundle comprising a central filament distinct from the core wire and surrounded by a plurality of outer filaments, at least a portion of the plurality of outer filaments extend proximal of the distal end surface of the core wire, the multi-filament bundle being mechanically connected to the core wire, the multi-filament bundle having a proximal end and a distal region, the multi-filament bundle being rotationally stable irrespective of a particular bending direction; and a coil adjacent to and surrounding at least a portion of the distal end of the core wire and the multi-filament bundle; wherein the coil extends from the distal region of the multi-filament bundle proximally beyond the proximal end of the multi-filament bundle, and wherein the plurality of outer filaments are braided around the central filament, wherein the guide wire is operable to orient the distal tip portion in any direction in a controllable fashion to provide a substantially 1:1 torque response and the multi-filament bundle is configured to transmit torque from the core wire to the distal tip portion.