sentences:  Endobronchial valves have also been shown to be beneficial in treatment of persistent air leaks in the lungs.It has also been theorized that endobronchial valves may be useful for treatment of tuberculosis and its complications.Endobronchial valves may be the first successful medical device treatment of emphysema, a disease that affects billions of patients worldwide and has no known cure, being managed traditionally by lung transplantation and/or lung volume reduction surgery (though some patients do not meet the eligibility requirements for one or both of these invasive procedures).