A dilator assembly is provided having a curved dilator being defined by a concave and a convex side and having at least one lumen. The dilator assembly also has a guiding catheter with at least one lumen, and the guiding catheter is disposed within the lumen of the curved dilator. The guiding catheter also has a bevel on the end of the catheter that facilitates insertion of a guide wire into the lumen of the catheter. Additionally, the bevel is oriented towards the convex side of the curved dilator to prevent the guide wire from separating from the guiding catheter. The bevel may also be designed to maximize the ease of feeding the guide wire into the lumen of the catheter while also maintaining the catheters shape and rigidity.
