Patent ID: 8216219
Filing Date: 2012-07-10
Classification: A61B

Abstract:
1. An application apparatus for applying a high frequency current for thermal sclerosis of body tissue, including a connected electrode array with at least three active electrodes which can be introduced into body tissue, a high frequency generator for producing a high frequency voltage, which generator is to be switchably connected to one or more of the electrodes, and a measuring device for measuring the impedance of the body tissue between all or selected active electrodes, characterised by a selector device which is connected to the measuring device and which is adapted to select a sub-array including at least two active electrodes from the electrode array on the basis of the measured impedance, and by a control device which is connected to the selector device and which is adapted to apply the high frequency voltage to the active electrodes of the selected sub-array in such a way that a high frequency current flows between them through the body tissue, characterized in that the selector device is of such a configuration that prior to the selection or the fresh selection of the sub-array including at least two active electrodes it causes the measuring device to implement a measurement in respect of the impedance or the ohmic resistance of the body tissue between all possible pairs of active electrodes and selects as the sub-array those active electrodes between which the impedance, the ohmic resistance, the change in impedance or the change in ohmic resistance is at its smallest.