Due to the weight and size of patients with morbid obesity, measuring the intestinal loops is sometimes technically impossible, with the added difficulty of visceral fat surrounding the organs. This makes the measurement of small intestine handles in these patients difficult task and sometimes during the manoeuvres of measuring segments, the tweezers can pierce the intestinal handle and pass unnoticed these lesions, because the grip of the handle near the mesenteric edge causes small herniations of the intestinal mucosa through muscle defects in the intestinal wall, very close to the mesenteric vessels, not visible by the large amount of mesenteric grease that covers them.

The evolution of medical imaging technology, based mainly on Computed Axial Tomography or multidetector CT and Nuclear Magnetic Resonance (NMR), has facilitated the obtaining of better and more accurate anatomical images. These advances have made preoperative planning much better, although one of the major limitations is that they offer information on flat screens.

The process of improving the skills of surgeons in the field of complex surgery has grown thanks to simulation-based training and the use of virtual reality, what has enabled the surgeon to automate their training to make an accurate measurement of what is going to work.

The Bariatric project is a prospective, single-centre observational study for validation, through surgical planning in an AR environment, of measurement of length of intestinal wings in advanced bariatric surgery type BPGL.