Patent ID: 7547288
Filing Date: 2009-06-16
Classification: A61M,B23K,Y10T

Abstract:
1. A guide wire comprising: a wire member, a first cover layer, a second cover layer and a coil, the wire member possessing an outer periphery; the wire member including a first wire disposed on a distal side of the wire member and a second wire disposed on a proximal side from the first wire; the first wire possessing a proximal end face and the second wire possessing a distal end face, the proximal end face of the first wire and the distal end face of the second wire being welded to one another at a welded portion so that the first and second wires do not axially overlap one another; the welded portion at which the proximal end face of the first wire and the distal end face of the second wire are welded possessing an outer diameter; the outer diameter of the wire member along its entire length being no greater than the outside diameter of the welded portion; the second wire being made of a cobalt alloy or stainless steel; the first wire being made of a superelastic alloy; the first cover layer surrounding the outer periphery of the wire member and covering the welded portion between the first wire and the second wire; the first cover layer being made of a resin material that reduces friction; the second cover layer being disposed on the distal side of the first cover layer without an axial gap between the first cover layer and the second cover layer, the first cover layer and the second cover layer do not axially overlap one another; the coil encircling a distal portion of the first wire and having an inside diameter greater than the outer diameter of at least a part of the distal portion of the first wire so that a gap exist between an inner periphery of the coil and the outer periphery of the part of the distal portion of the first wire; and the second cover layer covering the entire outer surface of the coil.