Patent ID: 6019779
Filing Date: 2000-02-01
Classification: A61F

Abstract:
An implantable multi-filar coil stent having a substantially tubular shape and an expanded stent length and expanded stent diameter in an expanded state adapted to be introduced, while reduced to a reduced stent diameter and stent length, to a site in a body lumen and implanted at the site at an expanded stent diameter and stent length in contact with the wall of the body lumen comprising:a plurality of coils each having a pre-determined coil cross-section and extending for a predetermined length between a first coil end and a second coil end and each wound in a common winding direction and having a common winding pitch through an intermediate portion of the coil length intermediate the first and second coil ends with opposing turns of said coils being substantially parallel spaced-apart in said intermediate portion and with said coils being non-overlapping in said intermediate portion; andsaid first coil ends coupled together at a first stent end for cooperatively maintaining said plurality of coils in a multi-filar winding relationship providing the substantially tubular stent shape and maintaining substantially parallel spacing between adjacent turns of the plurality of coils through said intermediate portion and, at said first stent end, said winding pitch of said plurality coils respectively varied for said first ends of said coils to be angled toward one another in helical paths to a cuspless, first common junction point in side-by-side alignment.