Patent ID: 8845551
Filing Date: 2014-09-30
Classification: A61M,B23K,C21D

Abstract:
1. A medical guide wire which has a core wire formed by a flexible elongate member, the core wire inserted to a helical spring body made of a radiotransparent coil, the core wire and the radiotransparent coil in part secured by a welding member, comprising: the radiotransparent coil being made by a metallic wire element wound in a spiral fashion; the metallic wire element made of an austenitic stainless steel wire treated with a solid-solution procedure, and drawn by a wire-drawing procedure with a whole cross sectional reduction ratio as 90%-99.5%, the solid-solution procedure meaning to form a uniform solid phase by evenly melting two or more metallic components; the welding member being made of a eutectic alloy having a melting temperature of 180° C.-495° C. including a eutectic alloy having a melting temperature of 180° C.-525° C. when the metallic wire element of the radiotransparent coil contains molybdenum as a component element of the austenitic stainless steel wire; the core wire and the radiotransparent coil in part secured by the welding member, wherein melting heat of the welding member increases a tensile rupture strength of the metallic wire element of the radiotransparent coil; and the whole cross sectional reduction ratio R being expressed by R=(S where S