title: Diagnostic significance of arterial-alveolar nitrogen tension difference in assessment of ventilation-perfusion ratio inequality.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D001158:Arteries; D001249:Asthma / Q000175:diagnosis / Q000188:drug therapy / Q000503:physiopathology; D001991:Bronchitis / Q000175:diagnosis / Q000503:physiopathology; D001993:Bronchodilator Agents / Q000494:pharmacology / Q000627:therapeutic use; D002908:Chronic Disease; D006801:Humans; D008171:Lung Diseases / Q000175:diagnosis*; D008875:Middle Aged; D009584:Nitrogen / Q000032:analysis* / Q000097:blood; D011650:Pulmonary Alveoli; D011653:Pulmonary Diffusing Capacity; D011656:Pulmonary Emphysema / Q000175:diagnosis / Q000503:physiopathology; D012119:Respiration / Q000187:drug effects; D013147:Spirometry; D014692:Ventilation-Perfusion Ratio
chemical_list: D001993:Bronchodilator Agents; D009584:Nitrogen