Abstract: A coupling wire guide structured to be slidably coupled to a previously introduced wire guide. The coupling wire guide includes a main body and a coupling tip, the coupling tip having first and second sections. The first section is connected to the main body, while the second section defines an axial passageway having a distal opening and a proximal opening. The axial passageway is sized to receive the previously introduced wire guide therein. Both a distal portion of the main body and the first section are constructed of nitinol, the distal portion and the first section being welded together using the native nitinol material of the distal portion and first section.