Clin Exp Emerg Med.
2016 Sep;3(3):148-157. 10.15441/ceem.15.105.
Chest compression quality, exercise intensity, and energy expenditure during cardiopulmonary resuscitation using compression-to-ventilation ratios of 15:1 or 30:2 or chest compression only: a randomized, crossover manikin study
- Affiliations
-
- 1Department of Emergency Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea. emart@catholic.ac.kr
- 2Department of Emergency Medicine, Hankook General Hospital, Jeju, Korea.
- 3Department of Family Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea.
- 4Department of Preventive Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea.
- 5CMC Clinical Research Coordinating Center, The Catholic University of Korea, Seoul, Korea.
- KMID: 2361021
- DOI: http://doi.org/10.15441/ceem.15.105
Abstract
OBJECTIVE
Our aim was to compare the compression quality, exercise intensity, and energy expenditure in 5-minute single-rescuer cardiopulmonary resuscitation (CPR) using 15:1 or 30:2 compression-to-ventilation (C:V) ratios or chest compression only (CCO).
METHODS
This was a randomized, crossover manikin study. Medical students were randomized to perform either type of CPR and do the others with intervals of at least 1 day. We measured compression quality, ratings of perceived exertion (RPE) score, heart rate, maximal oxygen uptake, and energy expenditure during CPR.
RESULTS
Forty-seven students were recruited. Mean compression rates did not differ between the 3 groups. However, the mean percentage of adequate compressions in the CCO group was significantly lower than that of the 15:1 or 30:2 group (31.2±30.3% vs. 55.1±37.5% vs. 54.0±36.9%, respectively; P<0.001) and the difference occurred within the first minute. The RPE score in each minute and heart rate change in the CCO group was significantly higher than those of the C:V ratio groups. There was no significant difference in maximal oxygen uptake between the 3 groups. Energy expenditure in the CCO group was relatively lower than that of the 2 C:V ratio groups.
CONCLUSION
CPR using a 15:1 C:V ratio may provide a compression quality and exercise intensity comparable to those obtained using a 30:2 C:V ratio. An earlier decrease in compression quality and increase in RPE and heart rate could be produced by CCO CPR compared with 15:1 or 30:2 C:V ratios with relatively lower oxygen uptake and energy expenditure.
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