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J Korean Soc Emerg Med > Volume 20(5); 2009 > Article
Journal of The Korean Society of Emergency Medicine 2009;20(5): 510-514.
Comparison of Quality of Cardiopulmonary Resuscitation in Manikins with a Change in the Compression to Ventilation Ratio from 30:2 to 15:1
Yoon Sung Kim, Jun Hwi Cho, Myoung Chul Shin, Hyun Young Choi, Joong Bum Moon, Chan Woo Park, Jeong Yeul Seo, Moo Eob Ahn, Seung Hwan Cheon, Jae Seong Lee, Bong Ki Lee, Byung Ryul Cho, Yong Hun Kim
1Department of Emergency Medicine, College of Medicine, Kangwon National University, Chuncheon, Korea.
2Clinical Research Institute of Kangwon National University Hospital, Chuncheon, Korea. cjhemd@kangwon.ac.kr
3Department of Emergency Medicine, College of Medicine, Hallym University, Chuncheon, Korea.
4Department of Internal Medicine, College of Medicine, Kangwon National University, Chuncheon, Korea.
ABSTRACT
PURPOSE:
To minimize an interruption in chest compression, reduce the hands-off time, the American Heart Association has recommended changing the ratio of chest compression to ventilation ratio to 30:2. However, current studies have shown that the hands-off time was >10 seconds with that method. For this reason, we reasoned that a chest compression to ventilation ratio of 15:1 would be a more suitable way to reduce hands-off time because this ratio will not change the total compression and ventilation count.
METHODS:
The subjects were asked to perform CPR for 5 cycles with a compression to ventilation ratio of 30:2. The subjects rested for 5 minutes, then performed CPR with a compression to ventilation of 15:1. The skill performance was measured and analyzed using a statistical program.
RESULTS:
In the group which performed CPR with a chest compression to ventilation ratio of 30:2, the average number of compressions per minute was 76+/-9, while at a chest compression to ventilation ratio of 15:1, the average number of compressions per minute was 68+/-9. Between the compression to ventilation ratios of 30:2 and 15:1, the count gap was 8.3+/-3.2. When CPR was performed at a chest compression to ventilation ratio of 30:2, the average hands-off time was 9.3+/-1.9. When CPR was performed at a chest compression to ventilation ratio of 15:1, the average hands-off time was 6.7+/-1.3. Between chest compression to ventilation ratios of 30:2 and 15:1, the time gap of the average hands-off time was 2.7+/-1.2 seconds.
CONCLUSION:
When the chest compression to ventilation ratio was 15:1, the hands-off time was significantly reduced, but the compressions per minute were also reduced.
Key words: Cardiopulmonary resuscitation, Hands-off time, Compression to ventilation ratio
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