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J Korean Soc Emerg Med > Volume 17(6); 2006 > Article
Journal of The Korean Society of Emergency Medicine 2006;17(6): 519-527.
Effect of Single-Rescuer Fatigue on the Quality of Cardiopulmonary Resuscitation with 30:2 and 15:2 Compression-toventilation Ratios
Yong Bum Kim, Se Min Choi, Young Min Kim, Won Jae Lee, Kyu Nam Park, Mi Jin Lee, Han Joon Kim, Suk Hwan Kim, Seon Hee Woo, Ji Eun Park
Department of Emergency Medicine, START Center for Medical Simulation1, College of Medicine, The Catholic University of Korea, Seoul, Korea. emart@catholic.ac.kr
ABSTRACT
PURPOSE:
Compression-to-ventilation (C:V) ratios of 30:2 are recommended in the 2005 guidelines for cardiopulmonary resuscitation (CPR). The aim of this study was to compare the quality of CPR performance with 30:2 and 15:2 C:V ratios and to evaluate the influence of single-rescuer fatigue on the quality of CPR performance.
METHODS:
Perceived fatigue and the quality of single-rescuer CPR performance were evaluated for fourth-year medical students randomized to perform CPR for 5 minutes at either a 30:2 or 15:2 ratio on a recording CPR manikin.
RESULTS:
Sixty students participated in this experimental study and were randomly assigned to two groups; group 30:2 (n=29, male=13, female=16) and group 15:2 (n=31, male=11, female=20). The mean percentage of correct compression (PCC) for 5 minutes was significantly different between two groups (group 30:2, 38.7+/-30.3% vs. group 15:2, 59.1+/-34.0%, p=0.017). A significant reduction in the PCC over the course of time was founded in group 30:2. In addition, the fatigue score in group 30:2 was significantly higher than in group 15:2 from the third minute (p<0.05). There was no significant correlation found between the body mass index of the rescuer and either PCC and fatigue score, but PCC decreased over the course of time for female students. Fatigue scores for female students in group 30:2 were also significantly higher than for men from the third minute (p<0.05).
CONCLUSION:
An increase in perceived fatigue and a decrease in quality of compression occurs with a 30:2 C:V ratio compared to a 15:2 C:V ratio from the third minute in single-rescuer CPR, and this effect is especially pronounced with female rescuers.
Key words: Cardiopulmonary resuscitation, Muscle fatigue
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