ABSTRACT
INTRODUCTION The term ‘electrosurgery’ covers a variety of processes used in minor surgery, ranging from the use of simple heated devices (electrocautery) through to uni-or bipolar radiosurgery (often referred to as diathermy). In electrocautery, the electrode tip, rather than human tissue, serves as the source of electrical resistance. Current passes through two wires connected to the cautery tip, which has inbuilt resistance. The current produces heat as it passes through the resistance. The heated tip works by burning and contracting the tissues it touches. With radiosurgery, the tip remains relatively cool. Current passing through the tip meets resistance as it reaches the body surface, and it is here that heat is produced. This chapter reminds the reader about the simpler forms of electrosurgery, but most of it describes the technique of radiosurgery using higher power equipment, which requires the development of new and different skills. It is important that the reader is aware of the need for additional training in this technique. Levels of difficulty are indicated by scalpel ratings. The more scalpel blades, the more difficult the procedure and the more practical experience will be required to become competent at the technique.
