US Patent 7591830 Airway balloon dilator

A medical apparatus for widening a stenosis in the airway of a patient which includes a central hollow core, an inflatable outer balloon, and at least one inner balloon inside the outer balloon. The apparatus also can include a flexible support member mounted on the external surface of the outer balloon with at least one microsurgical blade. The outer balloon can be dumbbell-shaped to keep the balloon in position over the stenosis when the balloon is inflated. The hollow core allows the patient to be ventilated during the procedure, the inner balloon(s) allow higher dilation pressures to be generated from inside the outer balloon, and the blade can form an effective cutting edge upon inflation of the outer balloon.