Method for treating gastro esophageal reflux disease

An endoscopic treatment method comprising:

• forming a damaged area in at least a portion of a digestive tract along a circumferential direction by performing thermal ablation while keeping a mucosal layer;
• and
• forming an incomplete stenosis in the digestive tract, while restoring the damaged area,
• wherein the digestive tract is a stomach,
• the damaged area includes the mucosal layer of an inner wall of the stomach near a cardiac orifice,
• the incomplete stenosis is formed around the cardiac orifice,
• the damaged area includes:
• an arcuate first area formed at an anterior wall of the stomach;
• and
• an arcuate second area formed at a posterior wall of the stomach, wherein:
• a first non-damaged area is positioned between the first area and the second area, and on a greater curvature side, the first non-damaged area being a first area where thermal ablation of the mucosal layer is not performed,
• a second non-damaged area is positioned between the first area and the second area, and on a lesser curvature side, the second non-damaged area being a second area where thermal ablation of the mucosal layer is not performed, and
• a dimension of the first non-damaged area in the circumferential direction is greater than a dimension of the second non-damaged area in the circumferential direction.