Abstract 286: Feasibility Study for Performing Effective Chest Compressions According to the American Heart Association 2010 Guidelines for CPR and ECC
Background: The American Heart Association 2010 Guidelines for CPR recommend that untrained bystanders provide CPR using chest compression only with an emphasis on “push hard and fast” (a chest compression depth of >5cm at a rate of >100 compressions/minute).
This study aimed to determine the feasibility of performing effective chest compressions according to the 2010 guidelines in comparison with the 2005 guidelines.
Methods: Fifty-eight sixth-year dentistry students participated in this study. They were divided into 2 groups, g-G2010 and g-G2005. The students were instructed to perform chest compressions according to the 2010 guidelines (g-G2010; compression rate >100 times per minute and >5 cm depth), or the 2005 guidelines (g-G2005; compression rate=100 times per minute and a depth of 4 to 5 cm). Both groups were asked to compress the chest of a manikin (HeartSim 4000, Laerdal Co.) for 5 one-minute sets, with a ten-second break between each set.
Results: The average numbers of chest compressions were 114 and 105 per minute in g-G2010 and g-G2005, respectively. Both groups maintained compression rates greater than 100 per minute during the 5-minute study period. In g-G2010, chest compressions deeper than 5 cm were achieved only in 58 ± 10 compressions in the first set, and this number decreased to 50 ± 10* compressions in the second set (*p<0.01 vs. the first set). The number of compressions deeper than 4 cm decreased significantly from 108 ± 4 in the first set to 97 ± 7* per minute in the second set (* p<0.05 vs. the first set). In g-G2005, on the other hand, the number of compressions deeper than 4 cm was 97 ± 5 in the first set, and decreased to 92 ± 6 in the second set (n.s.). In the third set, the number of compressions deeper than 4 cm in g-2010 further decreased to 84 ± 7* per minute, which was significantly lower than g-2005, which was 91 ± 6 in the same time set (*p<0.05 vs. g-2005).
Conclusions: Our study demonstrated that the compression depth in g-G2010 was inadequate in half of the compressions during the first minute of CPR, and its quality degraded further thereafter. These results suggest that the recommended depth of compression in the 2010 guidelines might be difficult for lay rescuers to achieve in compression-only CPR.
- © 2012 by American Heart Association, Inc.