Diathermocoagulation is the cauterization of tissues with high-frequency alternating current. Diathermocoagulation is used to stop bleeding during operations, removal of warts, some skin tumors, larynx, treatment of cervical erosion , retinal detachment, inflammation of the pulp of the tooth, gingival papilla hyperplasia. A current is passed through the body portion to be cauterized, allowing tissue to be heated to a temperature at which irreversible coagulation (coagulation) of proteins occurs. In this case, the inner and middle walls of the vascular walls wrinkle and wrap themselves in the lumen of the vessel; a thrombus is formed, which leads to blockage of blood vessels. This prevents bleeding and the possibility of infection in the bloodstream. Nerve coagulation reduces postoperative pain. Very strong currents should not be used, since in this case coagulation and rupture of the vessel wall may occur earlier than a thrombus has time to form and bleeding occurs. In this case, you can proceed to re-coagulation only after thorough drying of the operating field.
There are two ways of diathermocoagulation: pseudo-unipolar and bi-active. In the first case, one electrode (passive) in the form of a lead plate is applied to the waist, and the second (active) in the form of a needle, blade, or a ball is placed on the skin or mucous membrane area to be cauterized. In the bi-active method, two identical small adjacent electrodes are used.
Electrocoagulation is the cauterization of tissues by electric current (constant or variable high frequency). Electrocoagulation with direct current is produced by special tips, heated to the desired temperature by the current, the value of which is regulated by a rheostat. This outdated method is replaced by a more modern method - electro-diathermocoagulation. See also Electrosurgical treatment methods .