Electrical stimulation is defined as the use of an electrical current to transfer energy to a wound.
The type of electricity that is transferred is controlled by the electrical source. When capacitatively coupled electrical stimulation is used, two electrodes are required to complete the electric circuit. Electrodes are usually placed over wet conductive medium, in the wound bed and on the skin a distance away from the wound. When discussing electrical stimulation, it is important to distinguish the waveform used for the protocol. The HVPC devices also allow for selection of polarity and variation in pulse rates both of which seem to be important in wound healing.