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Also known as monothermy, one of the two types of electrocautery. Electrical current is passed from the probe (active electrode) where cauterization occurs and the patient's body serves as a ground. A grounding pad (returning electrode) is placed on the person's body, usually the thigh, and it carries the current back to the machine. Careful application of the return electrode is necessary as extensive burns can occur undetected if the electrode is not correctly positioned. For a definition of the other type of electrocautery, see also Bipolar Electrocautery.