Selection of emergency ventilators (differences between invasive and non-invasive ventilators):
1. From the classification of medical device management categories, non-invasive ventilators belong to Class II medical devices, while invasive ventilators belong to Class III medical devices (Class III has the highest level and requires the National Medical Device Registration Certificate issued by the State Administration).
2. For patients, invasive ventilation using with tracheal intubation, while non-invasive ventilation using with mask.
3. Invasive ventilators can be connected to high-pressure oxygen; The advantage is that it can meet the needs of critically ill patients with high pressure, high flow rate, and high oxygen concentration.