Implant delivery with modified detachment feature and pull wire engagement

A system comprising:

• an embolic tube comprising a lumen therethrough and defining a longitudinal axis;
• a detachment feature comprising:
• a distal portion extending within the lumen,
• a proximal portion extending proximally from a proximal end of the embolic tube,
• a proximal opening configured to receive a loop wire therethrough, and
• a sleeve comprising a longitudinal opening configured to receive a pull wire;
• a loop wire affixed to an extended delivery tube and extending through the proximal opening of the detachment feature;
• a pull wire extending through the delivery tube, extending through an opening in the loop wire, and inhibited from moving distally by the distal portion of the detachment feature;
• and
• a stretch resistant fiber
• wherein the proximal portion comprises the proximal opening,
• wherein the distal portion of the detachment feature further comprises a distal opening, and
• wherein the stretch resistant fiber passes through the distal opening and extends through the lumen of the embolic tube to a distal end of the embolic tube, the stretch resistant fiber being effective to limit separation of windings of the embolic tube as the embolic tube is under tension.

A method of delivering an implant comprising a detachment feature, the method comprising:

• inhibiting a distal end of a pull wire from moving distally by pressing the distal end of the pull wire into a distal extension of the detachment feature;
• delivering an implant delivery system through vasculature, the implant delivery system comprising an elongated delivery tube, the implant, and the pull wire;
• and
• pulling the pull wire proximally, thereby releasing the detachment feature from the delivery tube,
• wherein pulling the pull wire proximally, thereby releasing the detachment feature from the delivery tube further comprises pulling the pull wire proximally to exit a loop of a loop wire affixed to the delivery tube, thereby causing the loop wire to exit an opening through the detachment feature to disengage the detachment feature from the delivery tube.