Argon plasma coagulation (APC) is a non-contact thermal method of hemostasis that has generated much attention and excitement in recent years. The theoretical advantages of APC include its ease of application, speedy treatment of multiple lesions in the case of wide areas (the base of resected polyps or tumor bleeding), safety due to reduced depth of penetration, and lower cost compared to laser. By delivering energy to all tissue near the probe tip which will conduct electricity, APC can be used to treat a lesion around a fold and not clearly in view or en face.