Method and apparatus for marking a lumenal wall

A marking apparatus, comprising:

• a selectively inflatable balloon including an anterior wall and a posterior wall, the anterior wall and posterior wall are connected by an edge member that runs about a portion of the circumference of the balloon;
• a hollow tube extends from the balloon for connecting the balloon to a power source and vacuum source;
• an external lumen is formed along the anterior wall and posterior wall adjacent the edge member, the external lumen running from a proximal end of the hollow tube down through the length of the edge member, the external lumen being provided with anterior and posterior facing ports extending therealong, wherein the external lumen is coupled to a vacuum source at the proximal end of the hollow tube for creating a vacuum at the anterior and posterior facing ports sufficient to draw anterior and posterior walls of the gastric cavity into contact with the external lumen and the edge member;
• and
• RF energy delivery devices are positioned along the edge member adjacent the anterior and posterior facing ports, the RF energy delivery devices create burn marks by the heating and burning affected tissue.