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Research ArticleOriginal Research

Assessment of Noninvasive Oxygen Saturation in Patients with COPD during Pulmonary Rehabilitation: Smartwatch versus Pulse Oximeter

Morten Pallisgaard Støve, Aske Hostrup Graversen and Johanne Sørensen
Respiratory Care May 2023, respcare.10760; DOI: https://doi.org/10.4187/respcare.10760
Morten Pallisgaard Støve
Department of Physiotherapy, University College of Northern Denmark, Aalborg, Denmark.
Centre for General Practice, Aalborg University, Aalborg East, Denmark.
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Aske Hostrup Graversen
Department of Physiotherapy, University College of Northern Denmark, Aalborg, Denmark.
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Johanne Sørensen
Department of Physiotherapy, University College of Northern Denmark, Aalborg, Denmark.
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Abstract

BACKGROUND: Patients with COPD can have hypoxemia; hence, monitoring peripheral SpO2 during pulmonary rehabilitation is recommended. This study aimed to examine the accuracy of SpO2 readings in patients with COPD as measured by wearable devices at rest and after physical exercise.

METHODS: Thirty-six participants with COPD (20 women), ages 52–89 years, participated in this cross-sectional study. Oxygen saturation was concurrently measured by using the Contec Pulse Oximeter CMS50D as a comparator, and the Apple Watch Series 7 and the Garmin Vivosmart 4 at rest and immediately after the 30-s sit-to-stand test and the 6-min walk test (6MWT).

RESULTS: For the Apple Watch, the root mean squared error showed a deviation of 3.5% at rest, 4.1% after the 30-s sit-to-stand test, and 3.9% after the 6MWT. The level of agreement was 2.8 ± 2.4 (7.6, –1.9) at rest, 3.1 ± 2.8 (8.6, –2.3) after the 30-s sit-to-stand test, and 2.8 ± 2.9 (8.6, –2.9) after the 6MWT. For the Garmin Vivosmart, the root mean squared error showed a deviation of 3.3% at rest, 6.1% after the 30-s sit-to-stand test, and 5.4% after the 6MWT. Level of agreement was 1.9 ± 2.7 (7.2, –3.3) at rest, 2.9 ± 5.4 (13.5, –7.7) after the 30-s sit-to-stand test, and 2.3 ± 5.0 (12.1, –7.4) after the 6MWT. The limits of agreement showed considerable measurement variance and a tendency for the devices to be less accurate at lower saturation levels.

CONCLUSIONS: The Apple Watch Series 7 and Garmin Vivosmart 4 overestimated SpO2 in participants with COPD when SpO2 was < 95% and underestimated oxygen saturation when saturation was > 95%. These findings suggest that wearable devices should not be used to monitor oxygen saturation during pulmonary rehabilitation.

  • Wearable devices
  • validity
  • COPD
  • oxygen saturation
  • pulmonary rehabilitation
  • respiratory care

Footnotes

  • Correspondence: Morten Pallisgaard Støve, University College of Northern Denmark, Selma Lagerløfs vej 2, 9220 Aalborg, Denmark. E-mail: mps{at}ucn.dk
  • Copyright © 2023 by Daedalus Enterprises

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Respiratory Care: 68 (6)
Respiratory Care
Vol. 68, Issue 6
1 Jun 2023
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Assessment of Noninvasive Oxygen Saturation in Patients with COPD during Pulmonary Rehabilitation: Smartwatch versus Pulse Oximeter
Morten Pallisgaard Støve, Aske Hostrup Graversen, Johanne Sørensen
Respiratory Care May 2023, respcare.10760; DOI: 10.4187/respcare.10760

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Assessment of Noninvasive Oxygen Saturation in Patients with COPD during Pulmonary Rehabilitation: Smartwatch versus Pulse Oximeter
Morten Pallisgaard Støve, Aske Hostrup Graversen, Johanne Sørensen
Respiratory Care May 2023, respcare.10760; DOI: 10.4187/respcare.10760
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Keywords

  • Wearable devices
  • validity
  • COPD
  • oxygen saturation
  • pulmonary rehabilitation
  • respiratory care

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