WE DELIVER AT THE MAIN AIRPORTS. OUR CIP PRICE IS USD 3,500.00 Non-invasive ventilation is mainly applied to patients with mild or moderate respiratory diseases, free of emergency intubation, which of relatively stable vital signs, and no contraindications to non-invasive ventilator. It is used for early intervention and assisted withdrawal of invasive ventilatior. 1. Early intervention for respiratory failure for patients with COVID-19; 2. After extubating, the patient is removed from the invasive ventilator and transported to a noninvasive ventilator. The patient has a certain ability to breathe spontaneously and is in good condition, or applied when transferred to a general ward; Guidelines for non-invasive ventilation for patients with COVID-19; For mild to moderate patients (PaO2