Patent ID: 7972354

Claim:
An apparatus for treating a hollow anatomical structure, said apparatus comprising: a bioabsorbable fibrous body comprising: a plurality of loose, non-knit and non-woven fibers, each fiber being bulked in a generally radial direction, each fiber further having a number of bends along the length thereof such that in an at-rest state each fiber has a shorter length and a greater width than in a compressed state, each fiber also being formed from one or more bioabsorbable materials; said plurality of fibers being formed into an elongate bundle of fibers comprising at least about 500 fibers, said bundle being folded back along its longitudinal axis to form said fibrous body, said fibrous body extending in a generally longitudinal direction and being radially compressible for insertion into the hollow anatomical structure on account of the self-expandability of the individual fibers, after implantation the individual fibers configured to expand such that the fibers are relatively shorter in the longitudinal direction and relatively thicker in the radial direction compared to the compressed state, said fibrous body configured to generally occupy the lumen of the hollow anatomical structure after implantation to acutely slow the flow of blood through the hollow anatomical structure and to facilitate tissue in-growth within the hollow anatomical structure; and a tether coupled to said fibers in a distal portion of said body and configured to limit migration of said body when implanted in said hollow anatomical structure, the tether and a proximal portion of the body are non-coupled and thereby adapted for relative motion, the tether extending longitudinally along the body and substantially parallel thereto, the tether having a larger cross-section than the individual fibers and configured to extend past the individual fibers.