title: Acute exacerbation of dyspnea in a COPD patient.
mesh_terms: D000368:Aged; D000402:Airway Obstruction / Q000175:diagnosis; D002245:Carbon Dioxide / Q000097:blood; D004417:Dyspnea / Q000150:complications / Q000209:etiology*; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000150:complications*; D008297:Male; D010100:Oxygen / Q000097:blood; D011655:Pulmonary Embolism / Q000150:complications*; D013147:Spirometry; D014797:Vital Capacity; D014939:Work of Breathing
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen