Positive pressure ventilation refers to the use of mechanical ventilation with a ventilator for the treatment of diseases of the respiratory system. The main indications for its use are the following: 1. nocturnal assisted ventilation, diseases requiring nocturnal assisted ventilation include sleep apnea syndrome, congenital thoracic and pulmonary developmental malformations resulting in respiratory failure. 2. chronic obstructive pulmonary emphysema, chronic pulmonary heart disease and patients who have developed chronic respiratory failure, acute respiratory failure due to various causes of hypoxemia, hypercapnia, etc. 3. 3, due to paralysis of respiratory muscles such as post-polio, myasthenia gravis, etc. Positive pressure ventilation can be performed to prevent the emergence of hypoxemia and hypercarbia.