RF valvulotome

Details RF valvulotome RF valvulotome

1995-05-08

1997-05-06

Cohen, Lee S.

Surgery

Instruments

Electrical application

606 50, A61B 1739

Patent

active

056265786

ABSTRACT:
A RF valvulotome and method of use is described. The valvulotome comprises an elongated, flexible polymeric tube or rod supporting a pair of paddle members at its distal end, the paddle members defining opposed facing surfaces having a gap therebetween. A pattern of metallization, 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 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 may also be passed through the lumen of the instrument to facilitate viewing of the internal vein structure as the catheter is being advanced.

REFERENCES:
patent: 4791913 (1988-12-01), Maloney
patent: 4924882 (1990-05-01), Donovan
patent: 4952215 (1990-08-01), Ouriel et al.
patent: 5133725 (1992-07-01), Quadri
patent: 5171316 (1992-12-01), Mehigan
patent: 5234450 (1993-08-01), Segalowitz
patent: 5284478 (1994-02-01), Nobles et al.

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