Fissure Closure With the AeriSeal System for CONVERTing Collateral Ventilation Status (CONVERT)

The AeriSeal Foam functions by blocking both small airways and collateral channels causing absorption atelectasis in the treated region of the lung. Occlusion with the foam also yields a targeted fibrotic response which durably reduces lung hyperinflation. The reduction in hyperinflation allows the healthier parts of the lung to re-inflate and improve breathing mechanics and gas exchange. In this study, the AeriSeal delivery will be limited to three segments that contain the collateral channel(s) between lung lobes. A minimum 10 mL volume of AeriSeal will be delivered per segment, with a total delivered volume limit of 40 mL per subject (including re-treatment, if needed) in a total of three segments.

The Zephyr Valves are implantable bronchial valves intended to control airflow in order to improve lung function in patients with hyperinflation associated with severe emphysema and/or to reduce air leaks.