A catheter-cutter for aorto-coronary bypass graft cutting of vein valves within a vein graft and for the insitu bypass vein graft cutting of the valves within a vein includes at-least-one arcuate, razor-sharp, angled-tip cutting blade extending from the open distal end of the catheter, such at-least-one...http://www.google.sh/patents/US5092872?utm_source=gb-gplus-sharePatent US5092872 - Valvulotome catheter
