Medical insertion device

A medical device comprising:

• a generally elongate member with a distal end portion and a proximal end portion with a longitudinal axis and a lumen disposed therethrough, wherein the lumen is configured to allow the passage of a wireguide therethrough;
• wherein the proximal end portion defines a trough for accepting a tip of the wireguide and urging the tip into the lumen from a varying angle of attack with respect to the longitudinal axis, the trough is defined from an open proximal end providing communication with the lumen including a proximal end face with an arcuate first edge, the first edge circumscribes only a portion of a total circumference of the elongate member, the proximal end face transitions to a second face that is disposed distally of the proximal end face, the second face defining a second edge that circumscribes another portion of the total circumference of the elongate member.

The medical device of claim 18, further comprising a first transition face disposed between respective first ends of the proximal end face and the second face, and a second transition face disposed between respective second ends opposite from the respective first ends of the proximal end face and the second face.