Importance

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Abstract

Plasma coagulation devices are known in which a generally bare electrode wire is disposed in a tube that can be passed through the working channel of an endoscope until its end arrives in the field of view of the endoscope. Through the tube argon is supplied. A high-frequency current is supplied to produce a coagulation current in the form of an arc in the argon atmosphere between the end of the electrode wire and the portion of tissue to be coagulated. To simplify the arrangement and to improve its performance, in particular by reduction of the resistance to flow, it is proposed to supply the argon directly through the working channel and to use as conductor a wire insulated with thermally stable material, which at its end comprises a discharge section with a protective device to prevent a damaging direct flow of current into the portion of tissue to be coagulated.

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First Claim