| 摘要 |
<p>An RF valvulotome (10) and method of use is described. The valvulotome comprises an elongated, flexible polymeric tube or rod (12) supporting a pair of paddle members (22, 24) at its distal end (16), the paddle members defining opposed facing surfaces having a gap therebetween. A pattern of metalization (32, 34), comprising electrodes, are formed on the opposed facing surfaces and means are provided for applying RF energy between the electrodes after the instrument has been introduced into a vein and advanced to the point where the cusp of a vein valve is disposed in the gap. In a preferred embodiment, the paddles are movable toward and away from the center of the instrument, and may incorporate a flushing lumen (19) through which saline may be injected for effecting valve closure and facilitating placement of the paddle members within the pockets defining the valve. An optical fiber bundle (58) may also be passed through the lumen of the instrument to facilitate viewing of the internal vein structure as the catheter is being advanced.</p> |
