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A higher chest compression rate may be necessary for metronome-guided cardiopulmonary resuscitation

Authors
 Tae Nyoung Chung ; Sun Wook Kim ; Incheol Park ; Sung Phil Chung ; Young Soon Cho ; Je Sung You 
Citation
 American Journal of Emergency Medicine, Vol.30(1) : 226~230, 2012 
Journal Title
 American Journal of Emergency Medicine 
ISSN
 0735-6757 
Issue Date
2012
Abstract
OBJECTIVES: Metronome guidance is a simple and economical feedback system for guiding cardiopulmonary resuscitation (CPR). However, a recent study showed that metronome guidance reduced the depth of chest compression. The results of previous studies suggest that a higher chest compression rate is associated with a better CPR outcome as compared with a lower chest compression rate, irrespective of metronome use. Based on this finding, we hypothesized that a lower chest compression rate promotes a reduction in chest compression depth in the recent study rather than metronome use itself. METHODS: One minute of chest compression-only CPR was performed following the metronome sound played at 1 of 4 different rates: 80, 100, 120, and 140 ticks/min. Average compression depths (ACDs) and duty cycles were compared using repeated measures analysis of variance, and the values in the absence and presence of metronome guidance were compared. RESULTS: Both the ACD and duty cycle increased when the metronome rate increased (P = .017, <.001). Average compression depths for the CPR procedures following the metronome rates of 80 and 100 ticks/min were significantly lower than those for the procedures without metronome guidance. CONCLUSIONS: The ACD and duty cyle for chest compression increase as the metronome rate increases during metronome-guided CPR. A higher rate of chest compression is necessary for metronome-guided CPR to prevent suboptimal quality of chest compression.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/89417
DOI
10.1016/j.ajem.2010.11.026
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Emergency Medicine
Yonsei Authors
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Link
 http://www.sciencedirect.com/science/article/pii/S0735675710005681
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