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Inspired by aerodynamics, the Spiration Valve redirects air away from diseased or damaged lung to healthier tissue, all while allowing trapped air and secretions to escape, so that patients may breathe easier. Unlike a stent, the unique design of the Spiration Valve minimizes contact with the bronchial wall, maintains position to redirect air even in complex patients, and facilitates removal when needed. The Spiration Valve System is intended to treat severely diseased lung in patients with heterogeneous emphysema and evidence or markers of low collateral ventilation such as complete fi ssures, or damaged lung resulting in air leaks by limiting airfl ow to selected areas. The procedure is considered minimally invasive and can be performed through a flexible bronchoscope.