Patients with chronic obstructive pulmonary disease often suffer from hypoxia as their disease progresses. Hypoxia causes significant damage to various organs of the patient’s body, especially the heart, brain, kidneys and other important organs, resulting in serious consequences. However, many patients do not understand and pay attention to their hypoxia, and this misconception must be avoided. First of all, to understand the presence of hypoxia, to have the inspection equipment, the patient’s home should be routinely prepared pulse oximeter, just like hypertensive patients have blood pressure meter, diabetic patients have blood sugar meter. In fact, the pulse oximeter is not expensive, cheap hundreds of dollars, a little better 2-3 thousand dollars (this instrument can also output the measurement results to the computer to be saved). With a pulse oximeter, you can monitor the blood oxygen situation at any time and be able to grasp your condition at any time. Secondly, if the pulse oximetry is below 90%, it means that there is respiratory failure and you should have home oxygen therapy, preferably for more than 15 hours a day, especially at night when you sleep. At present, there are oxygen delivery companies in Shanghai, which can deliver oxygen to your home at any time. Of course, families with conditions can buy oxygen machines, the cheap oxygen machines on the market can be bought for more than 3,000 yuan, the power on the oxygen, convenient and practical. Patients with chronic obstructive pulmonary disease must pay attention to whether the lack of oxygen, and regular home oxygen therapy.