Development and efficiency of a noninvasive positive pressure ventilation via face mask with 2 channels and constant leakage

Abstract

Objective To explore the preparation and efficiency of a positive pressure ventilation (NPPV) via face mask with 2 channels and constant leakage function (TCCL). Methods The NPPV-TCCL via face mask was invented, designed, three-dimensionally constructed and manufactured by our team. Twenty-four healthy individuals were recruited and randomly divided into the test group and the control group to wear our produced NPPV-TCCL via face mask and conventional NPPV via face mask, respectively. Under standard experimental conditions with expiratory positive airway pressure (EPAP) of 5 and 10 cmH2O, the pressure of end-tidal carbon dioxide (PetCO2) was monitored in the mask. The inspired oxygen fraction (FiO2) was monitored in the mask when the FiO2 parameters of the ventilator were set to 30% and 50%, and inspiratory positive airway pressure (IPAP) was 10 and 20 cmH2O respectively. Results Under standard experimental conditions and at the same level of EPAP (5 or 10 cmH2O), the PetCO2 in the mask was significantly lower in the test group than the control group (all P 0.05). Conclusion NPPV-TCCL via face mask is superior to conventional NPPV mask in eliminating CO2 and having no effect on FiO2.

Keywords

• noninvasive positive pressure ventilation mask
• two channels
• constant leakage
• pressure of end-tidal carbon dioxide
• carbon dioxide rebreathing