Endoscopic Lung Volume Reduction: Review of the EMPROVE and LIBERATE trials

Abstract Endoscopic lung volume reduction is now included in the guidelines for treatment in severe chronic obstructive pulmonary disease. Since December 2018, 2 valve systems have been approved by the US Food and Drug Administration (FDA). To date, there is no head-to-head trial comparing both valve systems and no clear benefit of one over the other. This article provides an overview of the two largest prospective trials performed with the FDA-approved valve systems.