title: Expiratory gas concentration curves for examination of uneven distribution of ventilation and perfusion in the lung. First communication: theory.
mesh_terms: D002245:Carbon Dioxide / Q000032:analysis*; D006371:Helium / Q000032:analysis*; D008954:Models, Biological; D010100:Oxygen / Q000032:analysis*; D010477:Perfusion; D011650:Pulmonary Alveoli; D011656:Pulmonary Emphysema / Q000175:diagnosis; D012119:Respiration; D013997:Time Factors
chemical_list: D002245:Carbon Dioxide; D006371:Helium; D010100:Oxygen