Hook wire for preventing premature embolic implant detachment

A method comprising:

• providing a tubular body comprising a lumen extending therethrough and a distal tube disposed on a distal end of the tubular body;
• affixing a loop wire to the distal tube;
• positioning a loop opening in the loop wire approximate a distal end of the distal tube while the loop wire is affixed to the distal tube such that the loop wire is extended through the lumen;
• extending a pull wire through the lumen;
• extending the loop opening through a locking portion of an implantable medical device;
• extending a distal end of the pull wire through the loop opening;
• extending a hook wire radially through a sidewall of the distal tube and into the lumen;
• positioning the hook wire around a pull wire portion of the pull wire;
• tensioning the hook wire such that the pull wire portion abuts the sidewall;
• and
• preventing release of the implantable medical device while the implantable medical device is delivered through vasculature to a treatment site.