CPAP parameters include IPAP (inspiratory positive airway pressure), EPAP (expiratory positive airway pressure), Rise time (time to pressure rise), BPM (backup frequency), Ti (inspiratory time), Trigger (inspiratory trigger) and Cycle (expiratory switching).
The parameters of non-invasive ventilator are less than those of invasive ventilator, but these parameters are very important to improve the effectiveness and patient comfort of non-invasive ventilator.
The most important thing for the use of non-invasive ventilator is the cooperation of patients, and the parameters should be constantly adjusted according to the condition and comfort of patients.
IPAP is a parameter in BiPAP ventilation mode, and the difference between IPAP and EPAP is PS.
When inhaling, IPAP increases the gas pressure at the opening of the airway, assists patients to do work, relieves respiratory muscle fatigue and reduces oxygen consumption. At the same time, it produces pressure difference with intrapulmonary pressure and increases tidal volume and minute ventilation.
How to adjust IPAP?
IPAP can be set up from 8 to 12 cmH2O and increased to the appropriate treatment level within 5 to 20 min. RAMP (delayed boost) function can also be turned on. The commonly used regulation range is 8 ~ 25 cmH2O. When the IPAP exceeds 25 cmH2O, it may cause gastrointestinal qi or other side effects.
When EPAP is unchanged, when IPAP is regulated, PS level is regulated. PS is generally greater than 5 cmH2O;. Under the condition that patients' inspiratory effort, airway resistance and chest and lung compliance remain unchanged, the greater the PS, the greater the tidal volume.