title: Efficacy of bronchoscopic lung volume reduction by endobronchial valves in patients with heterogeneous emphysema: report on the first Asian cases.
abstract: Although many patients with severe emphysema have benefited from bronchoscopic lung volume reduction (BLVR) worldwide, experience of BLVR in Asian emphysema patients is scarce. Between July 2012 and March 2013, seven patients with advanced heterogeneous emphysema underwent BLVR in the Asan Medical Center. They had severe dyspnea and poor lung function (Modified Medical Research Council dyspnea scale 3-4; median forced expiratory volume in 1 sec [FEV1], 0.59 L [19.0 % predicted]; median 6-min walk distance [6MWD], 195 m). Endobronchial valves were inserted into the target lobe which was most hyperinflated and least perfused, and had no collateral ventilation with other lobes. Six patients showed clinical improvement after 1 month. Of them, 2 patients improved to dyspnea scale 1 and 4 patients did to scale 2 (P = 0.026). The median FEV1 increased from 0.59 to 0.89 L (51%; P = 0.028) and the median 6MWD increased from 195 to 252 m (29.2%; P = 0.028). Two patients developed a pneumothorax (one requiring drainage) and one patient experienced slight hemoptysis; however, there were no other serious adverse events. BLVR is effective in Asian advanced emphysema patients, with noted clinical improvements in lung function and exercise capacity.
authors.affiliation: Department of Pulmonary and Critical Care Medicine and Clinical Research Center for Chronic Obstructive Airway Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
authors.forename: Tai Sun
authors.identifier: 0000-0001-7383-7934
authors.initials: TS
authors.lastname: Park
authors.affiliation: Department of Internal Medicine, College of Medicine, Kangwon National University, Chuncheon, Korea.
authors.forename: Yoonki
authors.identifier: 0000-0002-1607-6777
authors.initials: Y
authors.lastname: Hong
authors.affiliation: Department of Pulmonary and Critical Care Medicine and Clinical Research Center for Chronic Obstructive Airway Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
authors.forename: Jae Seung
authors.identifier: 0000-0003-4130-1486
authors.initials: JS
authors.lastname: Lee
authors.affiliation: Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
authors.forename: Sang Min
authors.identifier: 0000-0002-2173-2193
authors.initials: SM
authors.lastname: Lee
authors.affiliation: Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
authors.forename: Joon Beom
authors.identifier: 0000-0003-0271-7884
authors.initials: JB
authors.lastname: Seo
authors.affiliation: Department of Pulmonary and Critical Care Medicine and Clinical Research Center for Chronic Obstructive Airway Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
authors.forename: Yeon-Mok
authors.identifier: 0000-0003-0116-4683
authors.initials: YM
authors.lastname: Oh
authors.affiliation: Department of Pulmonary and Critical Care Medicine and Clinical Research Center for Chronic Obstructive Airway Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
authors.forename: Sang-Do
authors.identifier: 0000-0001-8189-4509
authors.initials: SD
authors.lastname: Lee
authors.affiliation: Department of Pulmonary and Critical Care Medicine and Clinical Research Center for Chronic Obstructive Airway Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
authors.forename: Sei Won
authors.identifier: 0000-0003-4814-6730
authors.initials: SW
authors.lastname: Lee
mesh_terms: D000368:Aged; D044466:Asian People; D001999:Bronchoscopy / Q000379:methods*; D005541:Forced Expiratory Volume; D006801:Humans; D008168:Lung / Q000473:pathology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011013:Pneumonectomy / Q000379:methods*; D011656:Pulmonary Emphysema / Q000601:surgery*; D012720:Severity of Illness Index; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
keywords: Emphysema; Individualized Medicine; Lung Volume Reduction; Patient Selection; Pulmonary Disease, Chronic Obstructive