A sterile, non-surgical implantable device designed to be placed in a bronchial lumen to control bronchial airflow and improve health status, typically in a patient with emphysema and/or to reduce bronchial air leaks. It consists of a one-way valve that includes an expanding frame (e.g., Nitinol) with features to prevent migration after implantation, and a plastic membrane. It is intended to limit airflow distal to the valve while allowing mucus and air movement proximally. This results in the valve redirecting air to healthy portions of the lungs and/or venting lung segments to achieve pneumoreduction. The valve may remain permanently implanted or removed when medical indicated.