What technique is used to apply cautery current when removing polyps with a snare?

Using monopolar current in short bursts is the preferred technique for applying cautery when removing polyps with a snare during endoscopic procedures. This method involves delivering controlled, intermittent bursts of electrical energy. The advantage of short bursts is that they provide precise thermal effect, allowing for effective tissue cutting and coagulation while minimizing surrounding tissue damage. It also helps in preventing excessive heating, which could lead to unintended thermal injury to the adjacent structures.

In contrast to other methods, such as bipolar current in continuous flow, which might lead to more thermal spread, or high-frequency RF current, which may not provide as precise control, monopolar current allows the surgeon to maneuver more effectively during the procedure. Direct current in a steady application tends to create a uniform, continuous current flow which can overheat the tissues and is not typically used in the context of snare polypectomy. Therefore, the use of monopolar current in short bursts ensures a delicate balance between effective polyp removal and preserving surrounding tissue integrity.