title: Pulmonary function studies in patients with upper airway obstruction.
mesh_terms: D000328:Adult; D000368:Aged; D000402:Airway Obstruction / Q000150:complications / Q000209:etiology / Q000503:physiopathology*; D004417:Dyspnea / Q000209:etiology; D005260:Female; D006801:Humans; D006935:Hypercapnia / Q000209:etiology; D008297:Male; D008875:Middle Aged; D012119:Respiration; D012129:Respiratory Function Tests; D013147:Spirometry; D014134:Tracheal Neoplasms / Q000150:complications; D014797:Vital Capacity; D014826:Vocal Cord Paralysis / Q000150:complications