๐ ็ธฝ็ฎ้ ๏ฝ ๐ ่ฑๆๅๆ๏ผๆฌ็ฏ๏ผ ๏ฝ ๐ ๅฎๆด็ฟป่ญฏ ๏ฝ โญ ็ฒพ่ฏ็ญ่จ
Electrofulguration
Electrofulguration
Electrofulguration is useful in the setting of coagulation of large superficial areas (i.e., to destroy a large seborrheic keratosis or achieve hemostasis in an oozing field). In electrofulguration, the active electrode is held a few millimeters above the tissue. A spark, or arc of electricity, then jumps from the electrode to the tissue where it moves rapidly from location to location. Unlike using the contact mode, the current is therefore spread superficially over an area larger than just the tip of the electrode.17
In electrofulguration, each spark acts like an exquisitely fine electrode. The spark itself is high temperature, so it induces tissue destruction and coagulation at the site of contact. However, the temperature rapidly decreases with the increasing distance from the spark itself. Consequently, tissue charring is restricted to superficial tissue. If one wishes to achieve deeper heating and coagulation, this can be achieved by keeping a fulgurating electrode over a confined area for a prolonged period of time. Continuous heating of the superficial layers causes heating of the deeper layers.