FLEXIBLE HELICAL STENT HAVING DIFFERENT HELICAL REGIONS

摘要

The present invention relates to a tubular stent which is implanted in the body lumen. The stent (1500) comprises an intermediate ring section 1520 between having a cylindrical shape defining a longitudinal axis, the proximal helical section 1506, the distal helical section 1507 and these. Each of the proximal helical section, and a distal helical section, a plurality of strut members are oriented in the longitudinal direction (1513), and a plurality of hinged members are oriented in the circumferential direction to connect the strut members adjacent in the circumferential direction to form a band (1514 ) of having, the band is substantially so do with said longitudinal axis in a spiral manner to form a plurality of helical winding portions, wherein the distal helical section is wound in the longitudinal axis in the opposite direction from the proximal helical section . Ring intermediate section comprises a plurality of hinged members are oriented in the circumferential direction to connect to form an endless ring the adjacent strut members by a plurality of strut members are oriented in the longitudinal direction, and the circumferential direction.