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Figure 1e: Schematic drawings demonstrate orientation of electric field for (a) single bipolar applicator and (b–f) the simultaneous use of a triangular array of bipolar applicators activated in multipolar mode. By using a single bipolar applicator with both electrodes located on the same applicator shaft, electric current is directed parallel to the applicator (a). If three bipolar applicators are used, they are activated in multipolar mode. In this mode, every possible pair of electrodes, which are not necessarily located on the same shaft, is activated one after the other for a short period of time. The electric current may pass between electrodes on the same or on different applicator shafts. Drawings show possible combinations between (b) pairs of electrodes located on the same shaft, (c) applicators 1 and 2, (d) applicators 1 and 3, and (e) applicators 2 and 3. (f) Drawing demonstrates that, altogether, activation can be switched between 15 different combinations in multipolar mode.
