University of Oulu

N. Seifnaraghi et al., "Effects of Patient Recumbency Position on Neonatal Chest EIT," in IEEE Access, vol. 11, pp. 68257-68268, 2023, doi: 10.1109/ACCESS.2023.3290904

Effects of patient recumbency position on neonatal chest EIT

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Author: Seifnaraghi, N.1; De Gelidi, S.1; Frerichs, I.2;
Organizations: 1Department of Natural Sciences, Middlesex University London, London, U.K
2Department of Anesthesiology and Intensive Care Medicine, University Medical Centre Schleswig-Holstein, Kiel, Germany
3PEDEGO Research Unit, Medical Research Center, University of Oulu, Oulu, Finland
4Department of Children and Adolescents, Oulu University Hospital, Oulu, Finland
5Department of Radiology, Medical University of Graz, Graz, Austria
6Department of Electronic and Electrical Engineering, University College London, London, U.K
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.5 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2023
Publish Date: 2023-09-13


This paper investigates the overlooked effects of the patient recumbency positions on one of the key clinically used parameters in chest electrical impedance tomography (EIT) monitoring — the silent spaces. This parameter could impact medical decisions and interventions by indicating how well each lung is being ventilated. Yet it is largely dependent on assumptions of prior model at the reconstruction stage and the closely linked region of interest (ROI) during the final calculations. The potential effect of switching recumbency modes on silent spaces as a results of internal organ movements and consequently changes in initial assumptions, has been studied. The displacement and deformations caused by posture changes from supine to lateral recumbent were evaluated via simulations considering the simultaneous gravity-dependent movement and/or deformations of heart, mediastinum, lungs and the diaphragm. The reliability of simulations was verified against reference radiography images of an 18-month-old infant in supine and decubitus lateral positions. Inspecting a set of 10 patients from age range of 1 to 2 years old revealed improvements of up to 30% in the silent space parameters when applying posture consistent amendments as opposed to fixed model/ROI to each individual. To minimize the influence of image reconstruction technique on the results two different EIT reconstruction algorithms were implemented. The outcome emphasized the importance of including recumbency situation during chest EIT monitoring within the considered age range.

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Series: IEEE access
ISSN: 2169-3536
ISSN-E: 2169-3536
ISSN-L: 2169-3536
Volume: 11
Pages: 68257 - 68268
DOI: 10.1109/ACCESS.2023.3290904
Type of Publication: A1 Journal article – refereed
Field of Science: 217 Medical engineering
Funding: This work was supported in part by the Continuous Regional Analysis Device for neonate Lung (CRADL) Project ( funded by the European Union’s Horizon 2020 Research and Innovation Program (2014–2018) under Grant 668259, and in part by the Engineering and Physical Sciences Research Council (EPSRC) under Grant EP/T001259.
Copyright information: © The Author(s) 2023. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. For more information, see