An adjustable intraluminal valvulotome including a hollow tubular member in which is slidably disposed a control wire. First and second spring wire elements respectively interconnect first and second cutting blades having first and second perpendicular cutting edges to one end of the control wire. There...http://www.google.de/patents/US5049154?utm_source=gb-gplus-sharePatent US5049154 - Adjustable intra-luminal valvulotome
