Comparison of the Mapleson C circuit, 500 ml and 1.6 l self-inflating bags for delivering guideline-compliant ventilation during simulated adult cardiopulmonary resuscitation

  • Sherren P
  • Lewinsohn A
  • Jovaisa T
  • et al.
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Abstract

Introduction: Despite all the research and education that has gone into the field of cardiopulmonary resuscitation (CPR), survival rates remain bleak. A significant problem has been the discrepancy between teachings and witnessed clinical practice. As a result of this, and the deleterious outcomes associated with hyperventilation, we conducted a manikin-based study to evaluate three different ventilating devices and their ability to provide guideline-compliant ventilation during simulated adult CPR. Methods: A simulated cardiac arrest scenario was undertaken by 33 healthcare professionals (alpha = 0.05, power = 80%). Participants were asked to ventilate a simulated cardiac arrest patient for a period of 1 minute with all three devices, during which time various ventilatory parameters were recorded using a spirometer. The devices investigated were the Mapleson C circuit, adult (1.6 l) and paediatric (500 ml) self-inflating bags. P <0.01 was deemed statistical significant, due to multiple comparisons. Results: The paediatric self-inflating bag performed best, with signifi - cant improvement in the mean minute ventilation (P = 0.003), tidal volume (P <0.001) and peak airway pressure (P <0.001). Despite the significant differences, the paediatric self-inflating bag still delivered a mean minute ventilation of 7.01 l/minute, which still exceeds the Resuscitation Council's suggested 5 l/minute. See Table 1. (Table presented) Conclusions: Participants were found to be hyperventilating simulated cardiac arrest patients with all devices. The paediatric self-inflating bags delivered the most guideline-compliant ventilation and its use in adult CPR may be a simple measure to ensure delivery of more guidelineconsistent ventilation.

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Sherren, P., Lewinsohn, A., Jovaisa, T., & Wijayatilake, S. (2011). Comparison of the Mapleson C circuit, 500 ml and 1.6 l self-inflating bags for delivering guideline-compliant ventilation during simulated adult cardiopulmonary resuscitation. Critical Care, 15(S1). https://doi.org/10.1186/cc9710

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