Electrocautery is used extensively in otolaryngology--head and neck surgery. Its commonplace use and excellent safety record may lull the surgeon from heeding the device's potential dangers. User error causes the majority of patient injuries. A thorough understanding of the electrophysical principles and hazards is essential for even the occasional user. Three cases of electrosurgical injury are reported to demonstrate problem areas in electrocautery usage. The basic electrophysical properties are described, and guidelines for prevention of injury to the patient are reviewed.
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