The SMART BAG MO disposable bag-valve-mask resuscitator is designed to help emergency responders provide consistent ventilations to patients. The system includes an actuating mechanism inside the neck which responds to the rescuer and patient. The SMART BAG MO is able to restrict excessive flow of air into the patient’s airway and keep airway pressure from getting too high. If the rescuer squeezes harder, there will be greater restriction to flow.
(Source: American Heart Association )