The working principle of the ventilator: The normal breathing of the human body is due to the "active negative pressure difference" between the alveoli and the airway mouth through the breathing action, and the inhalation is completed. The thoracic and pulmonary elastic retraction after inhalation produces the alveolar and airway mouth passively. Exhale with a pressure difference to meet the needs of physiological ventilation. When the home ventilator autonomously ventilates, the inspiratory action produces pleural negative pressure, and the passive expansion of the lungs causes alveolar and airway negative pressure, which constitutes the pressure difference between the airway mouth and the alveoli and completes the inhalation; the thoracic and pulmonary elastic back after inhalation Shrink, generate the opposite pressure difference to complete the exhalation.
Oxygen machine working principle: using molecular sieve physical adsorption and desorption technology. The oxygen generator is filled with molecular sieves, and the nitrogen in the air is adsorbed during pressurization, and the remaining unabsorbed oxygen is collected, and after purification, it becomes high-purity oxygen, and then transported through a nasal catheter or an oxygen mask. Our body. Generally not suitable for use by critically ill patients!