A flexible helical stent that has different helical regions

摘要

The present invention relates to a tubular stents are implanted in a body lumen. The stent (1) has a cylindrical shape that defines a longitudinal axis and includes a helical section geometric proximal (1506), a distal section helocoidal (1507) and a section of the intermediate nael (1520) between them.Each of the helocoidais proximal and distal sections has a plurality of longitudinally oriented support members (1513), and a plurality of members of the hinge ring oriented (1154) that connect members of adjacent support ring to form a band.When the band is wrapped around the longitudinal geometric axis of a substantially helical manner to form a plurality of helocoidais winding, in which the distal section heliocoidal is wrapped around the longitudinal geometrical axis in the opposite direction of the section helo Coidal proxiamal.The section of the intermediate ring includes a plurality of longitudinally oriented support members and a plurality of members of the hinge ring oriented connecting states of adjacent support ring to form a ring without end.