A valvulotome for disrupting valve cusps in the vein of a patient includes a shaft and a cutting member which extends along an axis that defines an axial direction as well as an angular direction. First and second portions of the cutting member define respective cutting edges which extend outwardly...http://www.google.fr/patents/US5749882?utm_source=gb-gplus-shareBrevet US5749882 - Apparatus for disrupting vein valves
