| 摘要 |
The invention relates to an electrosurgical instrument ( 5 ) for an endoscope or a catheter, which can be operated by means of a high-frequency current, contact electrosurgical treatment and non-contact plasma coagulation in an ionisable gas. A stationary electrode ( 33 ) is arranged on the distal end of a guiding tube ( 7 ) that can be introduced into the instrument channel ( 1 ) of an endoscope catheter ( 3 ), and when the electrosurgical electrode for the contact treatment is in the retracted position in the guiding tube ( 7 ), the stationary electrode is connected to the electrosurgical electrode ( 11 ) by means of a contact element ( 37 ). The retraced position of the electrode ( 11 ) can, but not necessarily, be maintained by an abutment ( 21 ) of a handling device ( 13 ) and/or by a suitable arrangement and measurement of the contact element ( 37 ). The retracted position of the electrode ( 11 ) does not need to be optically controlled.
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