Not all emphysema requires oxygen. Generally speaking, combined with chronic obstructive pulmonary heart disease, the existence of hypoxemia respiratory failure recommended oxygen, preferred low-flow oxygen emphysema is generally nasal cannula oxygen, oxygen flow of 1-2L/min for the therapeutic dose (oxygen concentration of about 30%), oxygen time is greater than 10-15 hours a day. Emphysema is a common chronic disease of the respiratory system, the main symptoms are cough, sputum, shortness of breath, wheezing, but not all emphysema need oxygen, such as compensatory emphysema do not need. However, if hypoxemia already exists, oxygen inhalation can improve the hypoxic state of the body and improve the quality of life of patients. Emphysema is a chronic disease, it is recommended to follow up and review regularly under the guidance of specialists in regular hospitals.