Currently there are three FDA-approved<unk> s in the USA. These approved devices are placed via the esophagus using endoscopy. This can be done in an outpatient setting under sedation. One further<unk> , Allurion’s Ellipse, has European CE approval and does not require endoscopy for placement or removal. Once in place the<unk>  is filled with saline and remains as a free-floating object in the stomach cavity, too big to pass through the pylorus. In addition to saline, the<unk>  that is made from silicone may contain some radio-opaque material as a radiographic marker and a dye such as methylene blue to alert the patient if the<unk>  leaks. Studies have suggested that fluid is superior to air for distending<unk> s. Inflated<unk> s reduce the operative volume capacity of the stomach. While the typical<unk>  volume is about 900 ml, an inflated<unk>  may take up most of the space, about 700 (+/-100) ml.
Gastric balloon
Adjustable gastric band
Esophageal stent
Pyloromyotomy
Gastroduodenostomy
Nissen fundoplication
Replogle tube
Percutaneous endoscopic gastrostomy