Zephyr® Endobronchial Valve, end view

Views of the Zephyr® Endobronchial Valve vents showing an open valve during expiration (panel A) and a closed valve during inspiration (panel B).

Reproduced with permission from: Strange, C, Herth, FJ, Kovitz, KL, et al. Design of the Endobronchial Valve for Emphysema Palliation Trial (VENT): a non-surgical method of lung volume reduction. BMC Pulm Med 2007; 7:10. Copyright © 2010 BioMed Central Ltd.

Graphic 76276 Version 3.0