Patent ID: 8777979

Claim:
An assembly for deploying an implant into an aneurysm in a vessel, comprising: a tubular member having a longitudinal axis, a wall defining a lumen along the axis, and a distal portion having an inner cross-sectional dimension and a distal end; a coil implant having an enlarged proximal end; and a monolithic core wire extending within the lumen and contacting the enlarged end at a point, the core wire comprising a distalmost end region having a cross-section that is, in a plane transverse to the longitudinal axis and intersecting the point, substantially crescent shaped; wherein a length of a line segment extending from an outer surface of the enlarged end, through the point, and to an outer surface of the core wire is greater than the inner cross-sectional dimension, such that the enlarged end is prevented from moving within the lumen distally entirely past the distal end when the core wire and enlarged end are positioned radially adjacent each other within the lumen; wherein, prior to release of the coil implant from the tubular member, and when the enlarged end is unable to move within the lumen distally entirely past the distal end, the distalmost end region of the core wire extends distally and radially inward from a side of the lumen, contacted by the outer surface of the core wire, and into the distal end and beyond a distalmost portion of the distal end.