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Is Distance to the Nearest Registered Public Automated Defibrillator Associated with the Probability of Bystander Shock for Victims of Out-of-Hospital Cardiac Arrest?

Published online by Cambridge University Press:  13 February 2018

Joel Neves Briard ,
Luc de Montigny ,
Dave Ross ,
François de Champlain  and
Eli Segal
Joel Neves Briard
Affiliation:
Université de Montréal Medical School, Quebec, Canada
Luc de Montigny
Affiliation:
Corporation Urgences-santé, Quebec, Canada Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Quebec, Canada
Dave Ross
Affiliation:
Corporation Urgences-santé, Quebec, Canada Department of Prehospital Medicine, Hôpital du Sacré-Cœur de Montréal, Quebec, Canada
François de Champlain
Affiliation:
Corporation Urgences-santé, Quebec, Canada Department of Emergency Medicine, McGill University Health Centre, Quebec, Canada
Eli Segal*
Affiliation:
Corporation Urgences-santé, Quebec, Canada Department of Prehospital Medicine, Hôpital du Sacré-Cœur de Montréal, Quebec, Canada Department of Emergency Medicine, Jewish General Hospital, Quebec, Canada
*
Correspondence: Eli Segal, MD Research Module, Urgences-santé 6700 Rue Jarry East, 3rd Floor Montreal, Quebec, Canada H1P 0A4 E-mail: eli.segal@mcgill.ca
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Abstract

Introduction

Rapid access to defibrillation is a key element in the management of out-of-hospital cardiac arrests (OHCAs). Public automated external defibrillators (PAEDs) are becoming increasingly available, but little information exists regarding the relation between the proximity to the arrest and their usage in urban areas.

Methods

This study is a retrospective, observational, cross-sectional analysis of non-traumatic OHCA during a 24-month period in the greater Montreal area (Quebec, Canada). Using logistic regression, bystander shock odds are described with regards to distance from the OHCA scene to the nearest PAED, adjusted for prehospital care arrival delay and time of day, and stratifying for type of location.

Results

Out of a total of 2,443 OHCA victims identified, 77 (3%) received bystander PAED shock, 622 (26%) occurred out-of-home, and 743 (30%) occurred during business hours. When controlling for time (business hours versus other hours) and minimum response delay for prehospital care arrival, a marginal negative association was found between bystander shock and distance to the nearest PAED in logged meters (aOR=0.80; CI, 0.64-0.99) for out-of-home cardiac arrests. No significant association was found between distance and bystander shock for at-home arrests. Out-of-home victims had significantly higher odds of receiving bystander shock up to 175 meters of distance to a PAED inclusively (aOR=2.52; CI, 1.07-5.89).

Conclusion

For out-of-home cardiac arrests, proximity to a PAED was associated with bystander shock in the greater Montreal area. Strategies aiming to increase accessibility and use of these life-saving devices could further expand this advantage by assisting bystanders in rapidly locating nearby PAEDs.

Neves BriardJ, de MontignyL, RossD, de ChamplainF, SegalE. Is Distance to the Nearest Registered Public Automated Defibrillator Associated with the Probability of Bystander Shock for Victims of Out-of-Hospital Cardiac Arrest?Prehosp Disaster Med. 2018;33(2):153–159.

Keywords

automated external defibrillatorout-of-hospital cardiac arrestpublic access defibrillation
Type
Original Research
Information
Prehospital and Disaster Medicine , Volume 33 , Issue 2 , April 2018 , pp. 153 - 159
Copyright
© World Association for Disaster and Emergency Medicine 2018 

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Footnotes

Conflicts of interest/funding: FdeC is President of the Jacques-de Champlain Foundation (Quebec, Canada), a non-profit organization whose mission is to promote cardiovascular research and to improve resuscitation care in the province of Quebec. JNB was commissioned by the Jacques-de Champlain Foundation from June 2016 to May 2017 to populate the first provincial public automated external defibrillator registry in Quebec. The other authors have no conflicts of interest to report. Urgences-santé (Quebec, Canada) research personnel were remunerated for their work on this study. The other authors did not receive funding.

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