An electrosurgical instrument

专利名称：An electrosurgical instrument发明人：ROLF L. THOMAS,MARTIN P. H.

HOOLE,MARK BOWLES

申请号：AU2008285528申请日：20080718公开号：AU2008285528A1公开日：20090212

摘要：An electrosurgical instrument for the treatment of tissue in the presence of anelectrically-conductive fluid medium comprises an instrument shaft (10), and an electrodeassembly (12) at one end of the shaft. The electrode assembly (12) comprises a tissuetreatment electrode (14) and a return electrode (18) which is electrically insulated fromthe tissue treatment electrode by means of an insulation member (16). The tissuetreatment electrode (14) has an exposed surface for treating tissue, and the returnelectrode (18) has a fluid contact surface so as to define, in use, a conductive fluid paththat completes an electrical circuit between the tissue treatment electrode and thereturn electrode. The tissue treatment electrode (14) is provided with at least oneaperture (14a) through which vapour bubbles and/or particulate material can beaspirated from the region surrounding the tissue treatment electrode, and the tissuetreatment electrode and the insulation member are disposed such that there is a gaptherebetween forming an additional suction channel (25).

申请人：GYRUS MEDICAL LIMITED

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