A co-axial catheter assembly (100) including a first lumen (110) having a first distal end (114) and a first proximal end (112), and a second lumen (120) having a second distal end (124) and a second proximal end (122). The second lumen (120) extends co-axially with the first lumen (110), wherein the second lumen is at least partially disposed within the first lumen and the second distal end extends distally of the first distal end. The second distal end (124) includes a distal tip (130) and a bulbous projection (240) disposed between the distal tip and the first distal end. A method of inserting the catheter is also disclosed.
