title: Simultaneous washout of helium and sulfur hexafluoride in healthy subjects and patients with chronic bronchitis, bronchial asthma, and emphysema.
mesh_terms: D000328:Adult; D000368:Aged; D001249:Asthma / Q000503:physiopathology*; D001991:Bronchitis / Q000503:physiopathology*; D005459:Fluorides; D005652:Functional Residual Capacity; D006371:Helium; D006801:Humans; D008297:Male; D008875:Middle Aged; D011656:Pulmonary Emphysema / Q000503:physiopathology*; D012123:Pulmonary Ventilation; D012119:Respiration; D013455:Sulfur
chemical_list: D006371:Helium; D013455:Sulfur; D005459:Fluorides