title: Vital capacity breaths of 5 percent or 15 percent CO 2  in N 2  or O 2  to test carotid chemosensitivity.
mesh_terms: D001158:Arteries; D002245:Carbon Dioxide / Q000097:blood / Q000494:pharmacology; D002344:Carotid Body / Q000187:drug effects / Q000502:physiology*; D002628:Chemoreceptor Cells / Q000187:drug effects / Q000502:physiology*; D006801:Humans; D006935:Hypercapnia / Q000503:physiopathology*; D000860:Hypoxia / Q000503:physiopathology*; D008297:Male; D008722:Methods; D009584:Nitrogen / Q000494:pharmacology; D010100:Oxygen / Q000494:pharmacology; D010313:Partial Pressure; D014797:Vital Capacity
chemical_list: D002245:Carbon Dioxide; D009584:Nitrogen; D010100:Oxygen