A flexible stent structure includes a plurality of axially spaced strut portions defining generally tubular axial segments of the stent and constructed to be radially expandable. A helical portion is interposed axially between two strut portions and has a plurality of helical elements connected between...http://www.google.fr/patents/US7556644?utm_source=gb-gplus-shareBrevet US7556644 - Flexible stent
