Fulguration is the application of electrosurgical therapeutic current by means of an arc, or spark. Commonly used in dermatology and general surgery for bleeding control over large areas, the effect of the technique is somewhat superficial and does not go deep into tissue. The treatment area is desiccated to about 1mm depth with an underlying coagulum. There may appear some eschar on the surface. This arcing represents a column of ionized atmospheric gases and limits the flow of therapeutic current while spreading it out over an area under the electrode. High voltage is required for effective fulguration.
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