 A study on humans was done in Chile using the same technique  however the results were not conclusive and the device had issues with migration and slipping.A study recently done in the Netherlands found a decrease of 5.5 BMI points in 3 months with an endoluminal sleeve

Procedures that are restrictive shrink the size of the stomach or take up space inside the stomach, making people feel more full when they eat less.In the vertical banded gastroplasty, also called the Mason procedure or stomach stapling, a part of the stomach is permanently stapled to create a smaller pre-stomach pouch, which serves as the new stomach.