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Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
Published in: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine 1/2020

Open Access 01-12-2020 | Ultrasound | Original research

Emergency department non-invasive cardiac output study (EDNICO): an accuracy study

Authors: David McGregor, Shrey Sharma, Saksham Gupta, Shanaz Ahmed, Tim Harris

Published in: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine | Issue 1/2020

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Abstract

Background

There is little published data investigating non-invasive cardiac output monitoring in the emergency department (ED). We assess here the accuracy of five non-invasive methods in detecting fluid responsiveness in the ED: (1) common carotid artery blood flow, (2) suprasternal aortic Doppler, (3) bioreactance, (4) plethysmography with digital vascular unloading method, and (5) inferior vena cava collapsibility index. Left ventricular outflow tract echocardiography derived velocity time integral is the reference standard. This follows an assessment of feasibility and repeatability of these methods in the same cohort of ED patients.

Methods

This is a prospective observational study of non-invasive methods for assessing fluid responsiveness in the ED. Participants were non-ventilated ED adult patients requiring intravenous fluid resuscitation. Sensitivity and specificity of each method in determining the fluid responsiveness status of participants is determined in comparison to the reference standard.

Results

Thirty-three patient data sets were included for analysis. The specificity and sensitivity to detect fluid responders was 46.2 and 45% for common carotid artery blood flow (CCABF), 61.5 and 63.2% for suprasternal artery Doppler (SSAD), 46.2 and 50% for bioreactance, 50 and 41.2% for plethysmography vascular unloading technique (PVUT), and 63.6 and 47.4% for inferior vena cava collapsibility index (IVCCI), respectively. Analysis of agreement with Cohen’s Kappa − 0.08 for CCABF, 0.24 for SSAD, − 0.04 for bioreactance, − 0.08 for PVUT, and 0.1 for IVCCI.

Conclusion

In this study, non-invasive methods were not found to reliably identify fluid responders. Non-invasive methods of identifying fluid responders are likely to play a key role in improving patient outcome in the ED in fluid depleted states such as sepsis. These results have implications for future studies assessing the accuracy of such methods.
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Metadata
Title
Emergency department non-invasive cardiac output study (EDNICO): an accuracy study
Authors
David McGregor
Shrey Sharma
Saksham Gupta
Shanaz Ahmed
Tim Harris
Publication date
01-12-2020
Publisher
BioMed Central
DOI
https://doi.org/10.1186/s13049-020-0704-5

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