Abstract
Background: Despite of self-inflating bags (SIB) widespread use, studies have confirmed that many factors may have influence on ventilation.
Aim: To evaluate and to compare ventilatory parameters during manual ventilation with 4 different oxygen flows attached to the SIB.
Method: Twenty-two physiotherapists were asked to ventilate 2 lung models (neonatal/pediatric) using 3 SIBs (Hudson®, Laerdal®, JGMoryia®) with 0, 5, 10, and 15L/min of oxygen inflow attached. A lung function monitor (CO2SMOplus®) recorded inspiratory volume (Vi), peak inspiratory pressure (PIP), peak inspiratory (PIF) and expiratory (PEF) flows, and inspiratory time (Ti). The oxygen inflows were compared using ANOVA for repeated measures and Tukey's test, with p<0.05 considered statistically significant.
Results: When we analyze all brands in neonatal and pediatric models, the oxygen inflows influenced Vi, PIP, PIF, and Ti (p<0.001). When compared 0 and 15L/min, we found a significant increase in PIP in all neonatal SIB brands. Also, there was a difference in Vi delivered by neonatal Hudson® SIB.
Conclusion: We found great variability in ventilatory parameters depending on the oxygen inflow. The Vi, PIP, PIF, and Ti showed a large variation. Professionals should be aware of those differences and the choice of the oxygen flow used should be taken with caution.
- © 2011 ERS