Argon plasma coagulation (APC) is uses ionize argon gas jet flow to conduct electrons allowing a noncontact mode of treatment (lightning effect). (4, 5) APC has been popular in gastrointestinal endoscopy for superficial coagulation of large mucosal surfaces. The argon gas quite flexibly flows around bends and corners. Coagulated tissue has a higher resistance that automatically drives the argon gas flow away to nearby untreated tissue. An immediate effect really can be seen during electrocautery treatment, which corresponds well with the histological effect of coagulative necrosis.