PLASMA-GENERATING DEVICE, PLASMA SURGICAL DEVICE, USE OF A PLASMA-GENERATING DEVICE AND METHOD OF GENERATING A PLASMA

摘要

The present invention relates to a plasma-generating device comprising ananode, a cathode and an elongate plasmachannel which extends substantially in the direction from said cathode to saidanode. The plasma channel has a throttling portionwhich is arranged in said plasma channel between said cathode and an outletopening arranged in said anode. Said throttling portiondivides said plasma channel into a high pressure chamber, which is positionedon a side of the throttling portion closest to the cathode,and has a first maximum cross-sectional surface transversely to thelongitudinal direction of the plasma channel, and a low pressurechamber, which opens into said anode and has a second maximum cross-sectionalsurface transversely to the longitudinal directionof the plasma channel, said throttling portion having a third cross-sectionalsurface transversely to the longitudinal direction of theplasma channel which is smaller than said first maximum cross-sectionalsurface and said second maximum cross-sectional surface.Moreover at least one intermediate electrode is arranged between said cathodeand said throttling portion. The invention also relatesto a plasma surgical device, use of such a plasma surgical device in surgeryand a method of generating a plasma.