There is a difference between an oxygen absorber and a ventilator. Oxygen absorbing machine is to collect the oxygen in the air, purify and process it to form a high concentration of oxygen, and treat patients with hypoxia by means of a gas higher than the air oxygen concentration. It is mainly used to correct the patient’s hypoxia and increase the level of oxygen saturation and partial pressure of arterial blood oxygen. It can be applied to home oxygen therapy for patients with chronic obstructive pulmonary disease or other hypoxic diseases. The main function of the ventilator is to assist the ventilation function, it is a medical device that can send oxygen-rich air into the lungs and expel carbon dioxide-containing gases out of the body, helping the respiratory system to complete the ventilation process. It is mainly used for patients with respiratory failure, such as those who are not breathing on their own. There is a big difference between an oxygen absorber and a ventilator. If you need to use an oxygen absorber or a ventilator, you need to choose it under the guidance of your doctor.