Devices and methods are provided for administering a fluid to a neuronal site. A filter circuit is connected to receive the digital output signal for filtering the digital output signal to remove frequency variations which meet at least one predetermined parameter, thereby providing a filtered digital signal. The electrode structure is comprised of a connecting base formed of a silver paste 111 that is applied to an exposed part of the transparent electrically conductive film 110b, a copper tape 112 that is stuck on the upper surface of the silver paste 111, and a tabular connector 113 made of a metal that is pressed onto the copper tape 112 at one end thereof. The header has nozzles disposed at spaced locations directing pressurized air at the temperature being between about two and four times the curing temperature in Fahrenheit degrees of the coating applied to the object toward predetermined locations on the object. The present invention also provides the ability to \u201coverload\u201d current text and graphic annotations that are already displayed within an image of interest. The electrosurgical probe of this aspect of the invention further includes more than two electrodes operatively disposed at separate and distinct positions along the axis of the probe body.