title: Intrathoracic tracheal collapse--a pathophysiological study.
mesh_terms: D000403:Airway Resistance; D002675:Child, Preschool; D002933:Cineradiography; D006801:Humans; D007223:Infant; D008365:Manometry; D012123:Pulmonary Ventilation; D012119:Respiration; D014132:Trachea / Q000503:physiopathology*; D014133:Tracheal Diseases / Q000000981:diagnostic imaging / Q000503:physiopathology*