Embolic coil delivery system

摘要

A medical device for placing an embolic device at a predetermined site within a vessel of the body including an elongated flexible deployment catheter (12) having a lumen (14) extending therethrough and having proximal and distal ends; an elongated pusher member (16) having a lumen extending therethrough and having proximal and distal ends and being slidably disposed within the lumen of the deployment catheter; an embolic device (23) which takes the form of an embolic coil being coupled to a retaining ring (28); an engagement member (18) comprising a fiber having first and second ends attached to the distal end of the pusher member so as to form a loop portion having an aperture, said loop portion of said engagement member extending through said retaining ring; and, an elongated detachment member (30) extending from a position proximal of the proximal end of the pusher member, through the lumen of the pusher member and through the aperture of the engagement member such that when the detachment member is pulled proximally the distal end of the detachment member is withdrawn from the aperture of the engagement member to thereby release the embolic device.