The division of cardiothoracic surgery of the department of surgery at the chinese university of hong kong is among the first in the world ( and certainly first in asia ) to investigate a new device called the endobronchial valve ( ebv ) that can be placed through a bronchoscope into the segmental airway leading to the most emphysematous lung 香港中文大学外科学系心胸外科组为世界上率先进行支气管内单向活瓣（ endobronchialvalve ）装置临床研究的几家机构之一，亦是亚洲最先引进这一技术的医学中心。
