title: [Flow-volume curves, breathing air and helium-oxygen mixture; a test for detection of small airway disease (author's transl)].
mesh_terms: D000402:Airway Obstruction / Q000175:diagnosis; D005540:Forced Expiratory Flow Rates / Q000379:methods; D006371:Helium; D006801:Humans; D008297:Male; D008449:Maximal Expiratory Flow-Volume Curves / Q000295:instrumentation / Q000379:methods; D010100:Oxygen
chemical_list: D006371:Helium; D010100:Oxygen