A cautery pen is a type of medical equipment used in operating rooms, designed to cut tissue during surgical procedures. These pens connect to an electrocautery device and are employed in various surgeries. Through the electrosurgical method, cautery pens generate focused energy to perform tasks such as tissue destruction or coagulation

Cautery pens come in a wide array of shapes, allowing for precise energy focus for specific tasks. These shapes range from fine points for highly focused use to wide edges, square, or round rings for particular purposes, depending on the targeted area. The shape that contacts the body determines the size or area where the current acts, making the correct shape of the surgical electrode crucial.