Implications for cardiac arrest coverage using straight-line versus route distance to nearest automated external defibrillator
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Aim: Quantifying the ratio describing the difference between “true route” and “straight-line” distances from out-of-hospital cardiac arrests (OHCAs) to the closest accessible automated external defibrillator (AED) can help correct likely overestimations in AED coverage. Furthermore, we aimed to examine to what extent the closest AED based on true route distance differed from the closest AED using “straight-line”. Methods: OHCAs (1994–2016) and AEDs (2016) in Copenhagen, Denmark and in Toronto, Canada (2007–2015 and 2015, respectively) were identified. Three distances were calculated between OHCA and target AED: 1) the straight-line distance (“straight-line”) to the closest AED, 2) the corresponding true route distance to the same AED (“true route”), and 3) the closest AED based only on true route distance (“shortest true route”). The ratio between “true route” and “straight-line” distance was calculated and differences in AED coverage (an OHCA ≤ 100 m of an accessible AED) were examined. Results: The “straight-line” AED coverage of 100 m was 24.2% (n = 2008/8295) in Copenhagen and 6.9% (n = 964/13916) in Toronto. The corresponding “true route” distance reduced coverage to 9.5% (n = 786) and 3.8% (n = 529), respectively. The median ratio between “true route” and “straight-line” distance was 1.6 in Copenhagen and 1.4 in Toronto. In 26.1% (n = 2167) and 22.9% (n = 3181) of all Copenhagen and Toronto OHCAs respectively, the closest AED in “shortest true route” was different than the closest AED initially found by “straight-line”. Conclusions: Straight-line distance is not an accurate measure of distance and overestimates the actual AED coverage compared to a more realistic true route distance by a factor 1.4–1.6.
| Originalsprog | Engelsk |
|---|---|
| Tidsskrift | Resuscitation |
| Vol/bind | 167 |
| Sider (fra-til) | 326-335 |
| ISSN | 0300-9572 |
| DOI | |
| Status | Udgivet - 2021 |
Bibliografisk note
Funding Information:
This study was supported by the Danish Foundation TrygFonden with no commercial interest in the field of OHCA. The Resuscitation Outcomes Consortium Epistry study is supported by a cooperative agreement (5U01 HL077863) with the National Heart, Lung, and Blood Institute in partnership with the National Institute of Neurological Disorders and Stroke , Canadian Institutes of Health Research – Institute of Circulatory and Respiratory Health , Defense Research and Development Canada , Heart and Stroke Foundation of Canada, and American Heart Association . Rescu Epistry is funded by a centre grant from the Laerdal Foundation , and knowledge translation collaborative grants and operating grants from Canadian Institutes of Health Research and the Heart and Stroke Foundation of Canada.
Funding Information:
We thank the Danish AED Network for sharing information regarding AEDs, and the EMS personnel in Copenhagen that collect and register information concerning OHCAs. We are also grateful to Toronto Paramedic Services, Toronto Ontario Canada for sharing open data on AED location. Lastly the authors would like to thank the Rescu Epistry investigators and all emergency medical service operators, providers and medical directors as well as the in-hospital staff in the SPARC network hospitals working together in the front line of emergency patient care for their continued commitment contributions to high quality care and primary data collection in resuscitation research at Rescu, Li Ka Shing Knowledge Institute, St Michael's Hospital, Toronto Ontario, Canada. This study was supported by the Danish Foundation TrygFonden with no commercial interest in the field of OHCA. The Resuscitation Outcomes Consortium Epistry study is supported by a cooperative agreement (5U01 HL077863) with the National Heart, Lung, and Blood Institute in partnership with the National Institute of Neurological Disorders and Stroke, Canadian Institutes of Health Research?Institute of Circulatory and Respiratory Health, Defense Research and Development Canada, Heart and Stroke Foundation of Canada, and American Heart Association. Rescu Epistry is funded by a centre grant from the Laerdal Foundation, and knowledge translation collaborative grants and operating grants from Canadian Institutes of Health Research and the Heart and Stroke Foundation of Canada.
Publisher Copyright:
© 2021 Elsevier B.V.
ID: 304749827