Publication
Title
Excessive chest compression rate is associated with insufficient compression depth in prehospital cardiac arrest
Author
Abstract
Background and goal of study: The relationship between chest compression rate and compression depth is unknown. In order to characterise this relationship, we performed an observational study in prehospital cardiac arrest patients. We hypothesised that faster compressions are associated with decreased depth. Materials and methods: In patients undergoing prehospital cardiopulmonary resuscitation by health care professionals, chest compression rate and depth were recorded using an accelerometer (E-series monitor-defibrillator, Zoll, USA). Compression depth was compared for rates < 80/min, 80-120/min and > 120/min. A difference in compression depth >0.5 cm was considered clinically significant. Mixed models with repeated measurements of chest compression depth and rate (level 1) nested within patients (level 2) were used with compression rate as a continuous and as a categorical predictor of depth. Results are reported as means and standard error (SE). Results and discussion: One hundred and thirty-three consecutive patients were analysed (213,409 compressions). Of all compressions 2% were < 80/min, 62% between 80 and 120/min and 36% > 120/min, 36% were < 4 cm deep, 45% between 4 and 5 cm, 19% > 5 cm. In 77 out of 133 (58%) patients a statistically significant lower depth was observed for rates > 120/min compared to rates 80-120/min, in 40 out of 133 (30%) this difference was also clinically significant. The mixed models predicted that the deepest compression (4.5 cm) occurred at a rate of 86/min, with progressively lower compression depths at higher rates. Rates > 145/min would result in a depth < 4 cm. Predicted compression depth for rates 80-120/min was on average 4.5 cm (SE 0.06) compared to 4.1 cm (SE 0.06) for compressions > 120/min (mean difference 0.4 cm, P < 0.001). Age and sex of the patient had no additional effect on depth. Conclusions: This study showed an association between higher compression rates and lower compression depths. Avoiding excessive compression rates may lead to more compressions of sufficient depth. (C) 2012 Elsevier Ireland Ltd. All rights reserved.
Language
English
Source (journal)
Resuscitation. - Limerick, 1972, currens
Publication
Limerick : 2012
ISSN
0300-9572 [print]
1873-1570 [online]
Volume/pages
83:11(2012), p. 1319-1323
ISI
000311793100013
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 28.02.2013
Last edited 11.07.2017
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