Electrode arrangement for a surgical instrument for electrothermal coagulation in tissue
OwnerKai Desingerinventor
Life of this patent
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Abstract
There is provided a surgical instrument for electrothermal coagulation of tissue, which includes a front cylinder at the distal end of the instrument having a distal tip, an elongate carrier, and two spaced cylindrical or strip-shaped electrodes at or on the carrier which are connectable to an HF-ac voltage source.
Claims54
An electrode arrangement for a surgical instrument for electrothermal coagulation in tissue, comprising:
- a front cylinder at the distal end of the instrument with a distal tip, an elongate, electrically insulating carrier proximally adjoining the front cylinder, at least two spaced electrodes on the carrier, which are connectable to an AC voltage source, characterized in that the electrodes are of a strip-shaped configuration and extend along the carrier.
An electrode arrangement for a surgical instrument for electrothermal coagulation in tissue, comprising:
- a) a front cylinder at the distal end of the instrument;
- b) an elongate carrier proximally adjoining the front cylinder;
- c) two electrodes which extend in the longitudinal direction of the carrier and which are connectable to an AC voltage source;
- wherein the carrier includes externally disposed, self-supporting metal bar profile members which extend in the longitudinal direction and which are connected together by means of one or more insulating spacer elements and form the electrodes.
An electrode arrangement for a surgical instrument for electrothermal coagulation in tissue, including
- a) a front cylinder at the distal end of the instrument;
- b) at least one elongate, electrically insulating carrier proximally behind the front cylinder;
- c) two spaced cylindrical electrodes;
- d) a hollow duct in the longitudinal direction through the carrier;
- and
- e) connecting lines which are passed through the hollow duct for connecting the electrodes to an AC voltage source;
- wherein the electrodes are cylindrical tube portions of metal which are arranged at a predetermined spacing from each other in the longitudinal direction in axial alignment with the carrier.
An electrode arrangement for a surgical instrument for electrothermal coagulation in tissue, comprising:
- a) a front cylinder of metal at the distal end of the instrument;
- b) an elongate cylindrical carrier of insulating material proximally adjoining the cylinder;
- and
- c) two spaced cylindrical electrodes;
- wherein the metal front cylinder is rounded off at the distal end and adjoining the round end portion has a cylinder portion of predetermined length, wherein the front cylinder forms the first electrode and wherein disposed on the carrier at a predetermined axial spacing from the front cylinder is a metal layer as the second electrode.
Dependencies are inferred from the claim text.