RT Journal Article SR Electronic T1 Performance of Noninvasive Ventilation Masks in a Lung Model of COPD Exacerbation JF Respiratory Care FD American Association for Respiratory Care SP 1416 OP 1421 DO 10.4187/respcare.06746 VO 64 IS 11 A1 Bruno Rocha de Macedo A1 Francinni Mambrini Pires Rego A1 Fabia Diniz Silva A1 Juliana Valerio Pinaffi A1 Juliana Carvalho Ferreira YR 2019 UL http://rc.rcjournal.com/content/64/11/1416.abstract AB BACKGROUND: Noninvasive ventilation (NIV) reduces intubation and mortality in patients with COPD exacerbation who present with respiratory failure, and the type of mask may affect its success. Our objective was to compare the performance of 3 different NIV masks in a lung model.METHODS: We set the lung simulator mechanics and respiratory rate, and tested a small oronasal mask, a total face mask, and a large oronasal mask. We added CO2 at a constant rate into the system and monitored the end-tidal carbon dioxide. We used a mechanical ventilator to deliver NIV in 8 different combinations of inspiratory effort, pressure support, and expiratory positive airway pressure. We measured end-tidal carbon dioxide mask leakage, tidal volume, trigger time, time to achieve 90% of the inspiratory target during inspiration, and excess inspiratory time.RESULTS: We presented the mean ± SD of the 8 simulated conditions for each mask. The mean ± SD leakage was higher for the total face mask (51 ± 6 L/min) than for the small oronasal mask (37 ± 5 L/min) and for the large oronasal mask (21 ± 3 L/min), P < .001; but end-tidal carbon dioxide and tidal volume were similar. The mean ± SD 90% of the inspiratory target during inspiration was faster for the small oronasal mask (585 ± 49 ms) compared with the large oronasal (647 ± 107 ms) and total face mask (851 ± 105 ms), P < .001, all other variables were similar.CONCLUSIONS: In this model, we found that the type of mask had no impact on CO2 washout or on most synchrony variables.