Self-applied somnography : technical feasibility of electroencephalography and electro-oculography signal characteristics in sleep staging of suspected sleep-disordered adults

• Published in: Journal of Sleep Research
• Main Authors: Rusanen, Matias, Korkalainen, Henri, Grétarsdóttir, Heiður, Siilak, Tiina, Olafsdottir, Kristin Anna, Töyräs, Juha, Myllymaa, Sami, Arnardóttir, Erna Sif, Leppänen, Timo, Kainulainen, Samu
• Other Authors: Department of Engineering, Landspitali - The National University Hospital of Iceland
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2023
• Subjects: Náttúrufræðingar; home sleep apnea testing; portable diagnostics; sleep-disordered breathing; Cognitive Neuroscience; Behavioral Neuroscience; Iceland
• Online Access: https://hdl.handle.net/20.500.11815/4583; https://doi.org/10.1111/jsr.13977

Funding Information: Financial support for this study was provided by the European Union's Horizon 2020 Research and Innovation Programme under grant agreement No 965417, by the Research Committee of the Kuopio University Hospital Catchment Area for the State Research Funding (Grants 5041807, 5041804, 5041803, 5041797, and 5041794), by the Finnish Cultural Foundation through Kainuu Regional Fund and Central fund, by Olvi Foundation, by the Finnish Anti‐Tuberculosis Association, by Tampere Tuberculosis Foundation, by the Research Foundation of the Pulmonary Diseases, by the NordForsk (NordSleep Project 90458) through the Business Finland (Grant 5133/31/2018), by the Kuopio University Hospital Research Foundation, and The Icelandic Centre for Research. Publisher Copyright: © 2023 The Authors. Journal of Sleep Research published by John Wiley & Sons Ltd on behalf of European Sleep Research Society. Sleep recordings are increasingly being conducted in patients’ homes where patients apply the sensors themselves according to instructions. However, certain sensor types such as cup electrodes used in conventional polysomnography are unfeasible for self-application. To overcome this, self-applied forehead montages with electroencephalography and electro-oculography sensors have been developed. We evaluated the technical feasibility of a self-applied electrode set from Nox Medical (Reykjavik, Iceland) through home sleep recordings of healthy and suspected sleep-disordered adults (n = 174) in the context of sleep staging. Subjects slept with a double setup of conventional type II polysomnography sensors and self-applied forehead sensors. We found that the self-applied electroencephalography and electro-oculography electrodes had acceptable impedance levels but were more prone to losing proper skin–electrode contact than the conventional cup electrodes. Moreover, the forehead electroencephalography signals recorded using the self-applied electrodes expressed lower amplitudes (difference 25.3%–43.9%, p < 0.001) and ...