title: Excessive dynamic airway collapse in a small cohort of chronic obstructive pulmonary disease patients.
abstract: BACKGROUND
  The prevalence of EDAC (Excessive Dynamic Airway Collapse) has not been studied specifically in patients with chronic obstructive pulmonary disease (COPD).
  
  
  OBJECTIVE
  The aim of this study was to investigate the prevalence of EDAC in COPD and to determine whether there are clinical factors or functional variables that could influence the degree of expiratory collapse of central airways.
  
  
  METHODS
  Prospective observational study of a group of patients with COPD. The degree of tracheobronchial collapse was evaluated by low-dose dynamic airway computed tomography (CT). We recorded clinical and pulmonary function tests data, quality of life and BODE index.
  
  
  RESULTS
  This study included 53 patients with COPD, 46 (87%) males, mean age 65 (SD, 9) years.
  
  
  CONCLUSIONS
  The prevalence of EDAC observed in a sample of patients with different levels of COPD severity is low. The degree of dynamic central airway collapse was not related to the patient's epidemiological or clinical features, and did not affect lung function, symptoms, capacity for effort, or quality of life.
authors.affiliation: Department of Pneumology, Research Group of Respiratory and Infectious Diseases, University Hospital Complex of Vigo, Xerencia de Xestion Integrada de Vigo, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Represas-Represas
authors.affiliation: Department of Pneumology, Research Group of Respiratory and Infectious Diseases, University Hospital Complex of Vigo, Xerencia de Xestion Integrada de Vigo, Spain.
authors.forename: V
authors.initials: V
authors.lastname: Leiro-Fernández
authors.affiliation: Department of Radiology, University Hospital Complex of Vigo, Xerencia de Xestion Integrada de Vigo, Spain.
authors.forename: R
authors.initials: R
authors.lastname: Mallo-Alonso
authors.affiliation: Department of Pneumology, Research Group of Respiratory and Infectious Diseases, University Hospital Complex of Vigo, Xerencia de Xestion Integrada de Vigo, Spain.
authors.forename: M I
authors.initials: MI
authors.lastname: Botana-Rial
authors.affiliation: Department of Radiology, University Hospital Complex of Vigo, Xerencia de Xestion Integrada de Vigo, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Tilve-Gómez
authors.affiliation: Department of Pneumology, Research Group of Respiratory and Infectious Diseases, University Hospital Complex of Vigo, Xerencia de Xestion Integrada de Vigo, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Fernández-Villar
keywords: Chronic pulmonary obstructive disease; central airways; dynamic airway computed tomography; excessive dynamic airway collapse
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