GI Dynamics is touting the results of a small pilot study of its Endobarrier system that showed significant weight loss in morbidly obese patients.

The system combines the Lexington-based bariatric device maker’s flagship gastrointestinal liner, a plastic sleeve that’s inserted through the mouth into the intestine to prevent the absorption of nutrients from food, and its latest product, a flow restrictor that limits the amount of food that can pass from the stomach into the gastrointestinal tract.