Performance of Wrist-Worn Pulse Oximeter for the Screening of Obstructive Sleep Apnea

Document Type : Original

Authors

1 Medical Student, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.

2 Otolaryngology Research Center, Vali Asr Hospital, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran.

3 Otolaryngology Research Center, AmirAlam Hospital, Tehran University of Medical Sciences, Tehran, Iran.

10.22038/ijorl.2024.77290.3586

Abstract

Introduction:
A sleep apnea monitor (BM2000A) is a wrist-worn device that measures oxygen saturation and pulse rate during sleep. This study aimed to evaluate the efficacy of the watch-like BM2000A for screening obstructive sleep apnea (OSA).
BM2000A; Home sleep apnea testing; Obstructive sleep apnea; Polysomnography; Wrist pulse oximeter Materials and Methods:
102 patients complaining of sleep breathing disorders were included; 81% were men and 19% were women. All participants underwent overnight simultaneous polysomnography (PSG) and BM2000A sleep monitoring. The number of apneas and hypopneas, apnea-hypopnea index (AHI), percentage of time spent with oxygen saturation under 90%, average oxygen saturation, lowest oxygen saturation, and duration of sleep were computed by the BM2000A and PSG. Then, these parameters were compared to validate the BM2000A.
Results:
All parameters, measured with BM2000A, had a good correlation (r ≥ 0.6, p < 0.0001) with PSG-derived indexes, except for sleep time (r = 0.19, p = 0.061) and hypopnea index (r = 0.4, p < 0.0001). AHI had the strongest correlation (r = 0.87, p < 0.0001). The mean difference between AHI values calculated with PSG and wrist-worn pulse oximeter (WPO) was -17.66 events/h (95% CI: -50.39 to 15.06). In AHI ≥ 5, BM2000A had 90.7% sensitivity, 100% specificity, 91.2% accuracy, and 0.994 area under the curve. Using AHI ≥ 5, ≥ 15, and ≥30 as the screening criteria, optimal WPO-AHI cutoffs to improve the screening accuracy were 3.10, 8.92, and 13.05.
Conclusions:
BM2000A-derived results properly correlate with PSG and can provide OSA screening with good sensitivity and specificity.

Keywords

Main Subjects

References

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Iranian Journal of Otorhinolaryngology
Volume 36, Issue 5
September and October 2024
Pages 603-612

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