US Patent 7744545 Guide wire

A guide wire includes a wire body having a tapered portion disposed on a distal end portion thereof and having an outside diameter progressively reduced toward a distal end thereof. The guide wire includes a coil disposed in covering relation to the distal end portion of the wire body and a helically shaped wire. The coil includes an increasing wire-diameter portion where the diameter of the wire increases continuously toward a distal end thereof, the increasing wire-diameter portion being disposed in covering relation to the outer circumference of at least a portion of the tapered portion in a longitudinal direction.