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Sensitivity and specificity of two different automated external defibrillators used in-hospital and out-of-hospital
Kalmar County Hospital, Sweden.
Kalmar County Hospital, Sweden.
Linnaeus University, Faculty of Health and Life Sciences, Department of Health and Caring Sciences.ORCID iD: 0000-0002-0961-5250
Linnaeus University, Faculty of Health and Life Sciences, Department of Health and Caring Sciences.ORCID iD: 0000-0002-4064-3815
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2015 (English)In: Resuscitation, ISSN 0300-9572, E-ISSN 1873-1570, Vol. 96, no Supplement 1, p. 23-23, article id AS041Article in journal, Meeting abstract (Other academic) Published
Abstract [en]

Purpose: To investigate the performance of two different types of automated external defibrillators (AED) in out-of-hospital and in-hospital cardiac pulmonary resuscitation (CPR). Performance criteria in terms of sensitivity and specificity have been established but real life data are sparse.

Materials and methods: Three investigators reviewed 2938 rhythm analyses performed by AED in 240 consecutive patients (38.3% women) suffering cardiac arrest between January 2011 and March 2015. The mean age was 70.1 ± 17.0 (3 months–104 years). Two different AED were used (AED A n = 105, AED B n = 135) in-hospital (n = 91) and out-of-hospital (n = 149).

Results: Among 194 shockable rhythms, 17 (8.8%) were not recognized by AED A, while AED B recognized 100% (n = 135) of shockable episodes (p < 0.001). In AED A, 8 (47.1%) of these episodes were judged to be algorithm errors while 9 (52.9%) were caused by external artifacts. Among 1039 non-shockable rhythms, AED A recommended shock in 11 (1.0%), while AED B recommended shock in 63 (4.1%) of 1523 episodes (p < 0.001). In AED A, 2 (18.2%) of these episodes were judged to be algorithm errors (AED B, n = 40, 63.5%) while 9 (81.8%) were caused by external artifacts (AED B, n = 23, 36.5%). Fine ventricular fibrillation was analyzed as a separate category since guidelines do not recommend shock in these cases. AED A advised shock in 24 (80%) of 30 episodes, while AED B advised shock in 8 (47%) of 17 episodes (p < 0.027).

Conclusions: Significant differences in performance could be detected between two different AED. A higher sensitivity of AED B was associated with a lower specificity while a higher specificity of AED A was associated with a lower sensitivity. Caregivers should be aware of the specific shortcomings of the device they are using. AED manufacturers should try to improve the algorithms in order to minimize the gap between sensitivity and specificity.

Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 96, no Supplement 1, p. 23-23, article id AS041
National Category
Cardiac and Cardiovascular Systems
Research subject
Health and Caring Sciences
Identifiers
URN: urn:nbn:se:lnu:diva-72096DOI: 10.1016/j.resuscitation.2015.09.053OAI: oai:DiVA.org:lnu-72096DiVA, id: diva2:1194773
Conference
Resuscitation 2015: The Guidelines Congress, Prague, Czech Republic, October 29-31, 2015
Note

Part of special issue: Resuscitation 2015, ERC Symposium on Guidelines: Abstract Presentations

Available from: 2018-04-03 Created: 2018-04-03 Last updated: 2019-11-12Bibliographically approved

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Israelsson, JohanÅrestedt, KristoferSemark, BirgittaSchildmeijer, KristinaCarlsson, Jörg

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