Performance of a New Portable Wireless Sleep Monitor
Journal of Clinical Sleep Medicine (JCSM)
Study Objectives: To determine if signals generated by a new sleep monitor (Prodigy) are comparable to signals generated during in-laboratory polysomnography (PSG). Methods: Fifty-nine patients with various sleep disorders (25 with moderate/severe sleep apnea) were studied. Full PSG was performed using standard acquisition systems. Prodigy was attached to the forehead with four disposable snap electrodes. Four additional electrodes were attached to monitor eye movements and muscle activity, and
... to serve as reference (mastoid). One frontal EEG signal was outputted in real time from the monitor and stored in the PSG record along with the other PSG signals. PSG was scored for sleep variables manually, and monitor records were scored by a validated automatic system (MSS) (MSS-Prodigy). MSS-Prodigy was briefly edited following suggestions of an Editing Helper feature of MSS. Results: Technical failures resulted in one study being unusable and another with data for only 3 hours. Prodigy EEG signal stored in the PSG record was visually indistinguishable from the PSG-derived EEG signals. Important differences between manual scores and unedited MSS-Prodigy were seen in a few patients in some sleep variables (notably onset latencies and REM time). Editing Helper issued 2.1 ± 0.8 suggestions/file. Only these suggestions were pursued during editing. Intraclass correlation coefficients for manual vs. edited MSS-Prodigy were > 0.83 for all sleep variables except for stages N1 and N3 (0.57 and 0.58). Conclusions: When scored with MSS, and with only very minor editing, the monitor's results show excellent agreement with manual scoring of polysomnography data, even in patients with severe sleep disorders. Keywords: home sleep testing, ORP, odds ratio product, Prodigy Citation: Younes M, Soiferman M, Thompson W, Giannouli E. Performance of a new portable wireless sleep monitor. J Clin Sleep Med. 2017;13(2):245-258. pii: jc-00310-16 http://dx.doi.org/10.5664/jcsm.6456 BRIEF SUMMARY Current Knowledge/Study Rationale: The current need for investigating sleep disorders is much greater than can be met by the standard in-laboratory sleep studies. We compared the results of a new portable, wireless, forehead-mounted monitor that utilizes easy-to-apply frontal electrodes with results of in-laboratory full polysomnography in 59 patients with a range of sleep disorders including severe sleep apnea. Study Impact: We show that EEG signals generated by this monitor are visually indistinguishable from polysomnography signals and, when scored with its automatic system that requires minimal guided editing, produce results in good agreement with manual scoring, and, in addition, provides a continuous index of sleep depth throughout the night (Odds-Ratio-Product). This monitor may make it possible to obtain high quality inexpensive sleep evaluation in the home.