Pulmonx Corporation | 21,308 followers on LinkedIn. Improving Breathing and Quality of Life for Emphysema and Advanced COPD Patients | Pulmonx has developed the Zephyr Endobronchial Valve, a minimally invasive treatment for COPD/emphysema. The one-time procedure is done by bronchoscopy and requires no cutting or incisions. During the procedure, on average 4 tiny valves are placed in the airways to block off the diseased parts of the lung which allows trapped air to escape until the lobe is reduced.