An insertion tool for use in inserting a guide wire into a guide wire
lumen of a catheter for use in a lumen of an endoscope. The insertion
tool includes a main body having a main lumen and a funnel-shaped
extension connected to and disposed atop the main body. The funnel-shaped
extension having a funnel lumen. The funnel lumen has a top opening and a
bottom opening. The funnel lumen tapering from the top opening to the
bottom opening. The bottom opening positioned and sized to communicate
with the guide wire lumen of the catheter such that, when the catheter is
disposed in the main lumen, the guide wire may be easily inserted into
the top opening of the funnel lumen and into the guide wire lumen of the
catheter.