Whether oxygen intake is continuous or intermittent, it needs to be combined with the nature of the patient’s disease and the oxygen saturation level after oxygen intake to decide. 1. The nature of the disease: general cardiovascular and cerebrovascular ischemic diseases caused by hypoxia, can be continuous oxygen during the disease is conducive to the recovery of the condition; for chronic obstructive pulmonary disease, such as hypoxemia, the need for home oxygen therapy, generally recommended that the daily greater than 15 hours of low-flow oxygen; such as coronary heart disease in order to prevent myocardial infarction oxygen can be taken intermittent oxygen. 2. Oxygen saturation: generally in the state of oxygen saturation in the state of oxygen in the 94% or more, in order to alleviate the condition can be taken to intermittent oxygen, and oxygen in the state of oxygen in the state of oxygen in the 94% or less is recommended to continue to oxygen (oxygen concentration should be determined according to the condition) in order to help improve the condition and alleviate the patient’s discomfort. Whether the oxygen is continuous or intermittent and how the oxygen concentration is adjusted, it is recommended to communicate with the physician in time according to one’s own condition, and carry out oxygen therapy under the physician’s guidance.