A vascular stent includes at least one filament formed into a wave-like pattern, the filament being wound into a substantially spiral shape; and a device for connecting at least one end of the filament to slide on a another portion of the filament so as to form a hoop at each end of the spiral shape...http://www.google.es/patents/US5314472?utm_source=gb-gplus-sharePatente US5314472 - Vascular stent
