Core tip: The present study analyzed the results and complications of patients that underwent overweight treatment with Spatz3® adjustable balloon, which have as differential the possibility of adjusting the volume during treatment, fact that could lead to a smaller early removal incidence due to intolerance when the downward adjustment is done, and a greater weight loss when the upward adjustment during the treatment is accomplished. However, these benefits occur with a number of complications, although low in gravity, something greater than the traditional balloon.