The time needed for oxygen intake depends on the condition of the plateau reaction symptoms. If the plateau reaction only appears after the dizziness, nausea, weakness and other discomfort, generally need to inhale oxygen for about two hours can. However, it is better to inhale oxygen for two hours a day during the process of plateau reaction or during the time you stay in the plateau area, which can effectively relieve the symptoms of plateau reaction and also prevent the appearance of pulmonary edema, because once pulmonary edema occurs during plateau reaction, the symptoms are often heavy and many patients have to be sent to the hospital for treatment.