♦ Oxygen concentrator is mainly used for oxygen supply, improving the physiological and biochemical environment of the human body, promoting the benign circulation of metabolic processes, curing diseases, alleviating symptoms, promoting the rehabilitation and prevention of diseases, and improving health. Clinical practice has shown that the use of portable oxygen concentrators for oxygen therapy, with its unique treatment mechanism, acute and chronic hypoxia symptoms in the clinical department and secondary diseases caused by hypoxia, can effectively treat the effect. Proper resuscitation improves microcirculation and, if necessary, relieves respiratory load that maintains partial pressure of alveolar gas oxygen. Therefore, in clinical medicine, preventive medicine, emergency medicine, geriatrics, rehabilitation and health medicine, oxygen therapy, oxygen therapy, etc. Aspects have an irreplaceable role in reducing the effects of maintaining cardiac load on arterial oxygen partial pressure. Important roles and broad development prospects.