There are several different electrocoagulation techniques. They include:

• Bipolar electrocoagulation. Also known as multipolar electrocoagulation, it uses a device with two electrodes at the tip of a probe that create an electrical circuit. The electrical energy is converted to thermal energy, which coagulates (forms a blood clot) in the tissue when the temperature exceeds 140 degrees Fahrenheit (60 degrees Celsius). Bipolar electrocoagulation has largely replaced its predecessor, monopolar electrocoagulation. Bipolar electrocoagulation is used for bleeding ulcers and esophageal conditions such as Barrett's esophagus.
  
  
• Heater probe. A device that contains a thermocouple at its tip. The thermocouple contains wires of two different types of metals that measure temperature and produce thermal energy almost instantly to coagulate tissue. It is especially effective in treating bleeding ulcers and preventing additional bleeding of high risk lesions. Heater probes allow coagulation deeper into tissue, but with the added risk of perforation of the tissue.
  
  
• Argon plasma coagulation (APC). A newer type of electrocoagulation that allows the physician to seal irregular tissue without directly contacting the tissue. This is achieved by passing a current through ionized argon gas. APC can treat a large surface quickly. It also allows for the treatment of hard to reach locations within the digestive tract. It may be used for angiodysplasia and to remove tissue remaining after polypectomy. Unlike the other methods of electrocoagulation, APC does not involve direct contact of its probe with the tissue, so it cannot use direct pressure to assist in clotting.