Patent ID: 8540763

Claim:
A self-expandable aneurysm cover device comprising: a generally cylindrical skeletal frame having a longitudinal axis, said frame including a proximal loop portion at the proximal end of said skeletal frame which extends in a plane between opposite sides of said generally cylindrical skeletal frame, which is oblique to the longitudinal axis of the skeletal frame and which has a proximal edge, an elongated headpiece attached to the proximal edge of the proximal loop portion and extending from said proximal edge of the proximal loop portion in a direction generally parallel to the longitudinal axis of the skeletal frame, said skeletal frame being adapted to assume a normal first expanded condition to thereby cause said loop portion to be expanded to form a loop configuration which lies in the plane extending at an oblique angle to the longitudinal axis of said skeletal frame and to cause said skeletal frame to take the form of a generally cylindrical configuration, and upon moving the elongated headpiece in a proximal direction said proximal loop portion is caused to move to a position such that the plane of the loop portion is closer to parallel to the longitudinal axis of the skeletal frame thereby causing the skeletal frame to collapse for easy withdrawal of the aneurysm cover device from a vessel, and wherein the cylindrical skeletal frame includes outer struts and inner struts, the inner struts forming a connecting mesh extending between the outer struts, said outer struts being larger in cross section than said inner struts, and wherein the spacing between the inner struts in a generally central region of said mesh is much less than the spacing of the inner struts in portions of the skeletal frame near the outer struts.