A multi-method and multi-apparatus for treating obesity. The multi-method includes a method for estimating a volume of an intragastric balloon appropriate for an individual patient, a method for using an enterocutaneous fistula to inspect an intragastric balloon without sedation and endoscopic complications associated with an upper endoscopy, and a method for decreasing ability of the stomach of an individual patient to distend or expand after a meal increasing satiety and helping the individual patient to comply with a weight loss diet. The multi-apparatus includes an intragastric balloon for inflating without installation of a pressurized gas or liquid, an intragastric balloon for minimizing trauma of the intragastric balloon on the gastric mucosa, and an intragastric balloon for administering therapeutic medications.
