- Argon plasma coagulation
Argon plasma coagulation or APC is a medical endoscopic procedure used primarily to control bleeding from certain lesions in the
gastrointestinal tract , and also sometimes to debulk tumours in the case of patients for whom surgery is not recommended. It is administered duringesophagogastroduodenoscopy orcolonoscopy .APC involves the use of a jet of
ionized argon gas (plasma) that is directed through a probe passed through theendoscope . The probe is placed at some distance from the bleeding lesion, and argon gas is emitted then ionized by a high voltage discharge (approx 6kV) [http://www.mibalongastrico.comwww.gastrointestinalatlas.com/English/Colon_and_Rectum/Radiation_Colitis/radiation_colitis.html] . High-frequencyelectrical current is then conducted through the jet of gas, resulting in coagulation of the bleeding lesion on the other end of the jet. As no physical contact is made with the lesion, the procedure is safe, and can be used to treat bleeding in parts of the gastrointestinal tract with thin walls, such as thececum . The depth of coagulation is usually only a few millimetres.APC is used to treat the following conditions:
*angiodysplasia e, anywhere in the GI tract
*gastric antral vascular ectasia , or watermelon stomach
*colonic polyps, after polypectomy
*radiation proctitis
*esophageal cancer ee also
*
electrocautery
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