The present invention provides an improved
vascular occlusion device having improved flexibility and retention of the type fabricated from braided tubular
metal fabric having an expanded preset configuration and an elongated collapsed reduced
diameter configuration for delivery through a
catheter to a treatment site and shaped to create an
occlusion of an abnormal opening in a body organ or vessel, the woven
metal fabric having a memory property whereby the
medical device tends to return to said expanded preset configuration when unconstrained. The device further including at least one disk portion adjacent a body cylindrical portion formed from the fabric and having a transition
diameter between the disk and cylindrical portion, significantly smaller than the
diameter of the disk and the diameter of the cylindrical portion.