Stretch resistant embolic coil delivery system with mechanical release mechanism

A method of connecting an embolic device to a component of a deployment system, comprising:

• providing a tubular member comprised of a shape memory material and having a proximal end and a distal end;
• forming a kicker member at the distal end of the tubular member, wherein said kicker member is substantially parallel to a central axis of the tubular member;
• forming an engagement member at the distal end of the tubular member, wherein said engagement member is substantially parallel to the central axis of the tubular member and defines an aperture;
• providing an elongated pusher member having a lumen extending therethrough, a proximal end, and a distal end;
• securing the proximal end of the tubular member to the distal end of the pusher member;
• moving said engagement member to a deflected configuration toward the central axis of the tubular member;
• moving said kicker member to a deflected configuration toward the central axis of the tubular member;
• providing an embolic device having a retaining ring;
• positioning the retaining ring of the embolic device against a portion of the kicker member, with a portion of the aperture of the engagement member extending through the retaining ring;
• providing an elongated detachment member extending through the lumen of the pusher member;
• and
• passing a distal end of the detachment member through the aperture of the engagement member, thereby releasably securing the embolic device to the pusher member.

A component of a deployment system for delivering an embolic device to a target location of a body vessel, comprising:

• an elongated pusher member having a lumen extending therethrough and having proximal and distal ends;
• an engagement member extending from the distal end of the pusher member and having an aperture extending through a distal end thereof;
• and
• a kicker member comprising:
• a pair of arms extending away from the distal end of the pusher member in a direction away from a central axis of the lumen of the pusher member,
• a proximal crossbar extending between and connecting distal ends of the arms,
• a pair of extensions generally aligned with the arms and extending distally away from the proximal crossbar, and
• a distal crossbar extending between and connecting distal ends of the extensions,
• wherein the kicker member is movable toward the central axis of the lumen of the pusher member to a deflected configuration to cooperate with the engagement member to releasably secure an embolic device to the pusher member.