Effect of Different Interfaces on FIO2 and CO2 Rebreathing During Noninvasive Ventilation

2020 ◽  
Vol 66 (1) ◽  
pp. 25-32
Author(s):  
Li-Li Li ◽  
Bing Dai ◽  
Jie Lu ◽  
Xin-Yu Li
Keyword(s):  
Noninvasive Ventilation ◽  
Co2 Rebreathing

scholarly journals Performance of ICU ventilators during noninvasive ventilation with large leaks in a total face mask: a bench study

2014 ◽  
Vol 40 (3) ◽  
pp. 294-303 ◽  
Author(s):  
Maria Aparecida Miyuki Nakamura ◽  
Eduardo Leite Vieira Costa ◽  
Carlos Roberto Ribeiro Carvalho ◽  
Mauro Roberto Tucci
Keyword(s):  
Noninvasive Ventilation ◽  
Research Laboratory ◽  
Pressure Support ◽  
Face Mask ◽  
University Research ◽  
Positive End Expiratory Pressure ◽  
Co2 Rebreathing ◽  
Bench Study ◽  
Internal Volume ◽  
Co2 Elimination

Objective: Discomfort and noncompliance with noninvasive ventilation (NIV) interfaces are obstacles to NIV success. Total face masks (TFMs) are considered to be a very comfortable NIV interface. However, due to their large internal volume and consequent increased CO2 rebreathing, their orifices allow proximal leaks to enhance CO2 elimination. The ventilators used in the ICU might not adequately compensate for such leakage. In this study, we attempted to determine whether ICU ventilators in NIV mode are suitable for use with a leaky TFM. Methods: This was a bench study carried out in a university research laboratory. Eight ICU ventilators equipped with NIV mode and one NIV ventilator were connected to a TFM with major leaks. All were tested at two positive end-expiratory pressure (PEEP) levels and three pressure support levels. The variables analyzed were ventilation trigger, cycling off, total leak, and pressurization. Results: Of the eight ICU ventilators tested, four did not work (autotriggering or inappropriate turning off due to misdetection of disconnection); three worked with some problems (low PEEP or high cycling delay); and one worked properly. Conclusions: The majority of the ICU ventilators tested were not suitable for NIV with a leaky TFM.

Noninvasive Ventilation Overused Beyond COPD

2012 ◽  
Vol 5 (8) ◽  
pp. 18
Author(s):  
M. ALEXANDER OTTO
Keyword(s):  
Noninvasive Ventilation
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