Argon Argon coagulation uses the phenomenon of good conduction of high frequency current by ionized argon. Argon is a chemically inert gas, devoid of physiological effects and non combustible. Under the effect of current, it becomes ionized and forms a plasma cloud in which electric arcs are formed. Argon 2 In argon coagulation, there is no contact of the active electrode with the tissue, and the distance between the surgical instrument and the tissue in open surgery is up to about 5 mm, and in endoscopic surgery up to about 3 mm.