title: Physiologic features of upper airway obstruction.
mesh_terms: D000328:Adult; D000368:Aged; D000402:Airway Obstruction / Q000209:etiology / Q000503:physiopathology*; D000403:Airway Resistance; D001993:Bronchodilator Agents / Q000627:therapeutic use; D001999:Bronchoscopy; D002000:Bronchospirometry; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007818:Laryngeal Diseases / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology*; D008173:Lung Diseases, Obstructive / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D012119:Respiration; D012129:Respiratory Function Tests; D014133:Tracheal Diseases / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology*
chemical_list: D001993:Bronchodilator Agents