• J Brady Scott, Julie M Schneider, Karen Schneider, and Jie Li.
• Rush University, Department of Cardiopulmonary Sciences, Division of Respiratory Care, Armour Academic Center, 600 S. Paulina St., Chicago, IL 60612, USA.
• Am J Emerg Med. 2021 Jul 1; 45: 446-450.

IntroductionExcessive minute ventilation during cardiac arrest may cause lung injury and decrease the effectiveness of cardiopulmonary resuscitation (CPR). However, little is known about how clinicians deliver tidal volumes and respiratory rates during CPR.MethodsIn this cross-sectional study, licensed practitioners attending an American Heart Association (AHA) Advanced Cardiac Life Support (ACLS) course performed CPR and manual ventilation on a high-fidelity simulator during the megacode portion of the course. Delivered tidal volumes and respiratory rates were measured on a monitor. During the first scenario, results were not displayed to participants, but were displayed during the second scenario.ResultsFifty-two clinicians participated in this study. Average height was 169 (157,178) cm. Pre-monitor display tidal volumes delivered were larger in male participants compared to female participants (684.6 ± 134.4 vs 586.7 ± 167.6 ml, P = 0.05). Those using medium-sized gloves delivered smaller tidal volumes than those using small or large gloves. Twenty-two (42.3%) delivered tidal volume in the range of 5-8 ml/kg of predicted body weight for the simulation manikin, and 35 (67.3%) delivered tidal volumes with >20% variability among breaths. All participants met the target respiratory rate around 10 breaths/min.ConclusionTidal volume delivery varied greatly during manual ventilation and fewer than half participants delivered tidal volume at 5-8 ml/kg to the manikin. Sex and glove size appeared to impact tidal volume delivery when the participants were unaware of what they were delivering. Participants were able to meet the target respiratory rate around 10 without audio or visual feedback.Copyright © 2020 Elsevier Inc. All rights reserved.

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