Gastric balloon is inserted into the abdomen, which causes an early feeling of fullness. This method is used for patients with BMI 30 and higher. Thus, it is the only bariatric procedure suitable for clients with BMI lower than 35.

Spatz gastric balloon has some advantage in the game of a classic gastric balloon. It is introduced for up to 12 months; on the contrary, the classic gastric balloon has to be removed after 6 months. Another advantage is the ability to adjust the fluid in the balloon during these 12 months. This results in even greater weight reduction.