ELECTROSURGICAL INSTRUMENT WITH TWO ACTIVE ELECTRODES OPTIMISED FOR VAPORISATION AND COAGULATION

摘要

An electrosurgical instrument is provided for the treatment of tissue, the instrument comprising an instrument shaft (10) having a longitudinal axis, and an electrode assembly at one end of the shaft. The electrode assembly comprises first and second active electrodes (11, 14) and at least one return electrode (25). The first and second active electrodes (11, 14) each have an exposed surface to treat tissue disposed laterally of the longitudinal axis at a first radial an a second radial position with respect to the instrument shaft. The instrument has a first set of connections by which the first active electrode (11) can be placed in circuit with the return electrode (25), and a second set of connections by which the second active electrode (14) can be placed in circuit with the return electrode (25).