Patent ID: 8523932

Claim:
A self-expanding medical device delivery system comprising: a delivery sheath with a lumen and a proximal portion; an inner member partially disposed within said lumen of said delivery sheath, said inner member having a lumen and a proximal portion and a distal end, said proximal portion of said inner member having a plurality of first openings and a plurality of second openings, where said plurality of second openings is disposed proximally of said plurality of first openings; a self-expanding medical device disposed about said proximal end of said inner member, said self-expanding medical device having a proximal end, said self-expanding medical device having exposed structural members on said proximal end of said self-expanding medical device; a plurality of trigger wires partially disposed within said lumen of said inner member, each of said trigger wires of said plurality of trigger wires having a proximal portion with a first diameter and distal portion with a second diameter, where said first diameter is greater than said second diameter, wherein the distal portion of each of said trigger wires of said plurality of trigger wires extends distally through the lumen of said inner member; each of said trigger wires of said plurality of trigger wires exits said lumen of said inner member through one of the openings of said plurality of first openings and re-entering said lumen of said inner member through one of the openings of said plurality of second openings such that said proximal portion of each of said trigger wires of said plurality of trigger wires forms a bend, said bend engaging and retaining one of said exposed structural members such that said exposed structural members are compressed and retained by the bend, and said self-expanding medical device is retained by said proximal portion having a diameter greater than the diameter of the distal portion of each of said trigger wires of said plurality of trigger wires, wherein the diameter of the bend that retains said exposed structural member is said first diameter that is greater than said second diameter of the distal portion in order to provide adequate strength to retain said exposed structural member; and said plurality of trigger wires configured to be withdrawn in the distal direction through said lumen of said inner member such that said plurality of trigger wires disengages said exposed structural members and said self-expanding medical device.