An elongated generally cylindrical stent, fabricated of a resilient material, has a pair of side ends with a top end and a bottom end. The bottom end has a central spine along the entire extent of the stent. The central spine has a plurality of interleafing ribs. Each rib has a lower end coupled to the...http://www.google.fr/patents/US7815674?utm_source=gb-gplus-shareBrevet US7815674 - Self-expanding stent system
