High frequency incising device

Abstract

The high frequency incising device includes a flexible tubular member secured to a manipulating unit. The tubular member has an open ended tip portion and a pair of longitudinal spaced openings in the wall of the tube. An electrically conductive wire extends through the flexible tube passing outwardly thereof through a forward one of the longitudinal openings and being anchored to the flexible tube at a rearward one of the longitudinal openings. Such anchoring is accomplished by bending the wire toward the tip portion of the tube. A second bend portion in the outwardly exposed wire is directed away from the tip portion such that the outwardly exposed wire takes on the shape of a fan or sector. An opposite end of the wire is connected to an electrically conductive pipe that is movably disposed in the manipulating unit and the tube. An end of the movable pipe that projects beyond the manipulating unit is connected to an anchoring device that is movable with respect to the manipulating unit. Accordingly movement of the anchoring device causes movement of the electrically conductive wire which causes the outwardly exposed portion of the wire to bulge away from the tube in an amount that is based upon a relative position of the anchoring device with respect to the manipulating unit. A contrast medium that is injected into the tube has a relatively unobstructed passage through the tip of the tube since the wire disposed within the tube and the bent portions of the wire within the tube do not impede flow of such contrast medium to the tip.