CPAP is Continuous Positive Airway Pressure. That is to say, a mask is used to send a continuous positive air flow into the airway. A machine that uses this method to supply oxygen is called a CPAP ventilator. It means that under the condition of autonomous breathing, patients should have stable respiratory driving force and appropriate tidal volume, and apply a certain degree of positive airway pressure in the whole respiratory cycle, so as to prevent airway collapse, increase functional residual volume, improve lung compliance, and improve oxygenation. In this mode, the ventilator only maintains a certain positive airway pressure without mechanical ventilation. Only for patients with spontaneous breathing. If the patient has apnea, CPAP ventilator can provide necessary mechanical ventilation according to the preset frequency to ensure the safety of the patient.
It is mainly applicable to the rescue of people who snore and cause sleep apnea at night and acute heart failure.