The indications for mechanical ventilation are broad, but patients need to be mechanically ventilated mainly because of respiratory failure, which is caused by various reasons, and is manifested by low partial pressure of oxygen or high partial pressure of carbon dioxide in blood gas tests. For example, oxygen partial pressure, because the normal partial pressure of oxygen <60mmHg or carbon dioxide partial pressure >50mmHg, or in some patients with chronic obstructive pulmonary disease, the partial pressure of carbon dioxide increases sharply, exceeding the usual value, about 10-20mmHg or more is also an indication for ventilating. Or metabolic acidosis, such as a PEEP value below 7.10 cmH2O, may be considered for ventilating. Mechanical ventilation is one of the most common emergency measures and is a lifesaving tool in the treatment of respiratory failure, but it still has complications. Some of the most common ones are pneumothorax, especially in elderly people with pulmonary herpes, or some special diseases, such as patients with frequent serious infections, these patients are prone to pneumothorax. There is also the most common ventilator-associated pneumonia, where some patients who have been on the ventilator for more than 3 days will develop respiratory-related lung infections secondary to their condition, leading to deterioration and even bad outcomes.