title: Mass spectrometer for multiple respiratory gas analysis.
mesh_terms: D002245:Carbon Dioxide / Q000032:analysis; D005740:Gases / Q000032:analysis*; D006371:Helium / Q000032:analysis; D013058:Mass Spectrometry / Q000295:instrumentation*; D009584:Nitrogen / Q000032:analysis; D009589:Nitrogen Oxides / Q000032:analysis; D010100:Oxygen / Q000032:analysis; D012119:Respiration
chemical_list: D005740:Gases; D009589:Nitrogen Oxides; D002245:Carbon Dioxide; D006371:Helium; D009584:Nitrogen; D010100:Oxygen