Chronic obstructive pulmonary disease, better known as chronic obstructive pulmonary disease, is very important in clinical oxygen therapy. If you have conditions, you can buy an oxygen machine, the oxygen concentration of the oxygen machine can reach 95%-98%, in addition there are no harmful ingredients to harm the body, so it is very safe. General low-flow oxygen therapy 1-2L/min, also according to the patient’s condition, if the oxygen saturation is still above 85%, can be given to 2-3L/min, of course, must pay attention to the patient’s underlying disease, the acute phase is not well treated, if now in the acute phase, pure oxygen therapy is not enough. If the oxygen concentration is too high, it may also cause carbon dioxide retention. So it is important to pay attention to this problem in clinical practice. If you don’t have an oxygen machine at home, you can use an oxygen bottle. Oxygen bottles are also good in clinical practice, it is mainly less convenient and more expensive, a bottle of oxygen is 60 yuan, if used 24 hours, it will be finished in 2-3 days. So in the clinical situation, according to the individual situation then choose which kind of oxygen intake.