CPREzy (TM): an evaluation during simulated cardiac arrest on a hospital bed

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Colleges, School and Institutes


CPREzy(TM) is a new adjunct designed to improve the application of manual external chest compressions (ECC) during cardiopulmonary resuscitation (CPR). The aim of this study was to determine the effect of using the CPREzy(TM) device compared to standard CPR during the simulated resuscitation of a patient on a hospital bed. Twenty medical student volunteers were randomised using a cross over trial design to perform 3 min of continuous ECC using CPREZy(TM) and standard CPR. There was a significant improvement in ECC depth with CPREzy(TM) compared to standard CPR 42.9 (4.4) mm versus 34.2 (7.6): turn, P = 0.001; 95% CI d.f. 4.4-12.9 mm. This translated to a reduction in the percentage of shallow compressions (51 mm): CPREZy(TM) 6.5 (19)% versus standard CPR 0 (0.1)%. P = (0.012). There was no difference in compression rate or duty cycle between techniques. Equal numbers of participants (40% in each group) performed one of more incorrectly placed chest compression. However the total number of incorrect compressions was higher for the CPREZy(TM) group (26% versus 3.9% standard CPR, P <0.001). This was due to a higher number of low compressions (26% of total compressions for CPREZy(TM) versus 1% for standard CPR, P <0.001). In conclusion, CPREZy(TM) was associated with significant improvements in ECC performance. Further animal and clinical studies are required to validate this finding in vivo and to see if it translates to an improvement in outcome in human victims of cardiac arrest. (C) 2004 Elsevier Ireland Ltd. All rights reserved.


Original languageEnglish
Pages (from-to)103-108
Number of pages6
Issue number1
Publication statusPublished - 1 Jan 2005


  • chest compression, cardiopulmonary resuscitation, cardiac massage, basic life support