Positioning and detaching implants

摘要

Intravascular implant systems and methods of positioning and detaching implants are described. One such system carries an implant by retaining an engagement member in a position proximal to an aperture at a distal end of the delivery system. The engagement member is retained proximal to the aperture by an elongate member that is coupled to the implant. Once the implant is in a desired implant position, the elongate member is released from the engagement member, and the implant is allowed to move away from the delivery system.

主权项

1. An assembly for deploying an implant into an aneurysm, comprising:
a tubular member having (a) a member lumen in the tubular member and (b) an opening at a distal end portion of the tubular member; a coil implant configured for placement into an aneurysm and having (a) a coil; (b) a coil lumen extending longitudinally within the coil; and (c) a securing member (i) extending within the coil lumen, (ii) coupled to the coil at a distal region of the securing member, and (iii) having an enlarged proximal portion larger than, and positioned distal to, the opening, the enlarged portion having a proximally facing surface; and an elongate member extending in the member lumen, through the opening, and coupled to the enlarged portion, the elongate member being moveable through the opening to bring the proximally facing surface of the enlarged portion into contact with the distal end portion of the tubular member; wherein proximal movement of the elongate member relative to the distal end portion results in the enlarged portion contacting the distal end portion and separating from the elongate member.