An apparatus is provided for introducing a wire guide into a vessel through a medical device. The apparatus generally includes a body, a distal tip, and a first advancement wheel. The body defines a first axial passageway therein. The distal tip of the body defines a male Luer fitting and terminates in a taper having an angle relative to an outer surface of the male Luer fitting. The advancement wheel is rotatably attached to the body and positioned adjacent the first axial passageway. The first wheel defines a grasping area contacting the wire guide and axially translates the wire guide relative to the body. A holder is preferably attached to a proximal end of the body and stores a portion of the guide wire for delivery into the vessel.