Medical devices for use in delivering occlusive implants

A medical device for use in delivering an occlusive implant, the medical device comprising:

• a core shaft having a distal end region;
• wherein the core shaft includes a coil;
• wherein the coil includes an open pitch section adjacent to the distal end region of the core shaft;
• a tip member coupled to the distal end region, the tip member having a collar region configured to attach the tip member to the core shaft and an occlusive implant securing region configured to be attached to an occlusive implant;
• wherein the collar region is bonded to the distal end region such that a portion of the distal end region of the core shaft forms a mechanical bond with the collar region;
• and
• a sleeve disposed over the collar region.

A method for manufacturing a medical device, the method comprising:

• engaging a collar region of a tip member with a distal end region of a core shaft;
• wherein the collar region includes a plurality of apertures formed therein;
• and
• bonding the collar region with the distal end region such that a portion of the distal end region of the core shaft extends into at least some of the apertures and forms a mechanical bond with the collar region.