Bariatric surgery guidelines. Conceptual image of overweight and obese people being weighed on scales and holding blood glucose monitors. Being overweight is a risk factor for diabetes, which affects blood glucose levels. The measuring tape (green) represents body size measurements, and the scales show the range of assessments for bariatric surgery. Bariatrics is a medical speciality concerning the causes, prevention, and treatment of obesity. The artwork on the scales shows a gastric bypass (blue), a form of bariatric surgery to the stomach (red).