Mouth-to-mouth ventilation is superior to mouth-to-pocket mask and bag-valve-mask ventilation during lifeguard CPR: A randomized study

作者：Adelborg Kasper; Dalga** Christian; Grove Erik Lerkevang; Jorgensen Carsten; Al Mashhadi Rozh Husain; Lofgren Bo^*

来源：Resuscitation, 2011, 82(5): 618-622.

DOI：10.1016/j.resuscitation.2011.01.009

• Cardiopulmonary resuscitation (CPR)
• Mouth-to-mouth ventilation
• Mouth-to-mask ventilation
• Bag-valve-mask ventilation

Aim: The quality of cardiopulmonary resuscitation (CPR) is a crucial determinant of outcome following cardiac arrest. Interruptions in chest compressions are detrimental. We aimed to compare the effect of mouth-to-mouth ventilation (MMV), mouth-to-pocket mask ventilation (MPV) and bag-valve-mask ventilation (BMV) on the quality of CPR.
Materials and methods: Surf lifeguards in active service were included in the study. Each surf lifeguard was randomized to perform three sessions of single-rescuer CPR using each of the three ventilation techniques (MMV, MPV and BMV) separated by 5 min of rest. Data were obtained from a resuscitation manikin and video recordings.
Results: A total of 60 surf lifeguards were included (67% male, 33% female, mean age 25 years). Interruptions in chest compressions were significantly reduced by MMV (8.9 +/- 1.6 s) when compared to MPV (10.7 +/- 3.0 s, P < 0.001) and BMV (12.5 +/- 3.5 s, P < 0.001). Significantly more effective ventilations (visible chest rise) were delivered using MMV (91%) when compared to MPV (79%, P < 0.001) and BMV (59%, P < 0.001). The inspiratory time was longer during MMV (0.7 +/- 0.2 s) and MPV (0.7 +/- 0.2 s, P < 0.001 for both) compared to BMV (0.5 +/- 0.2 s). Tidal volumes were significantly lower using BMV (0.4 +/- 0.2 L) compared to MMV (0.6 +/- 0.2 L, P < 0.001) and MPV (0.6 +/- 0.3 L, P < 0.001), whereas no differences were observed when comparing MMV and MPV.
Conclusion: MMV reduces interruptions in chest compressions and produces a higher proportion of effective ventilations during lifeguard CPR. This suggests that CPR quality is improved using MMV compared to MPV and BMV.

• 出版日期2011-5