Ear oximetry during combined hypoxia and exercise
Abstract
Ear oximetry is widely used to detect arterial O2 desaturation during exercise in patients with cardiopulmonary disease. Although oximeters have been evaluated for accuracy, response time, and the influence of skin pigmentation, tests of their reliability have not been reported during strenuous exercise. Accordingly, we compared arterial O2 saturation (Sao2) measurements obtained by Hewlett-Packard (HP, model 47201A) and Biox II oximeters with those determined directly from arterial blood in six healthy volunteers during progressive exercise while rebreathing hypoxic gas mixtures. The relationship between the HP oximeter value and blood Sao2 was described by the equation: HP = 0.93 (Sao2) + 5.37 and for the Biox II: Biox = 0.55 (Sao2) + 38.97. With these equations, at a blood Sao2 value of 90%, the underestimation by both oximeters was less than 2%. At a blood value of 70%, the HP oximeter overestimated blood Sao2 by 0.7%, whereas the Biox II showed an overestimation of 10.7%. Below blood Sao2 of 83%, the Biox II tended to overestimate blood Sao2 by an amount greater than the error of the instrument, whereas the HP estimations were within the error of the instrument over all levels of blood Sao2 studied. We conclude that the HP oximeter provides valid estimates of Sao2 during exercise but that the Biox II oximeter, although reflecting qualitative changes in oxygenation that occur during exercise, does not provide accurate records of the degree of desaturation.
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Two recent diagnostic studies provide evidence on clinical implications resulting from the bias in pulse oximetry for blood oxygen saturation levels.
“Two recent diagnostic studies provide evidence on clinical implications resulting from the bias in pulse oximetry for blood oxygen saturation levels [7, 57].”
From The effects of skin pigmentation on the accuracy of pulse oximetry in measuring oxygen saturation: a systematic review and meta-analysis (2022) · cites this paper as [57]
At least two studies used diagnostic accuracy design and only presented proportions of participants with specific ranges of SpO2 in relation to specific SaO2 values, rather than SpO2 and SaO2 data.
“At least two studies used diagnostic accuracy design and only presented proportions of participants with specific ranges of SpO2 in relation to specific SaO2 values, again rather than SpO2 and SaO2 data [7, 57].”
From The effects of skin pigmentation on the accuracy of pulse oximetry in measuring oxygen saturation: a systematic review and meta-analysis (2022) · cites this paper as [57]
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Shi, C., Goodall, M., Dumville, J. C., Hill, J. E., Norman, G., Hamer, O., Clegg, A., Watkins, C. L., Georgiou, G., Hodkinson, A., et al. (2022) · Figshare · doi:10.6084/m9.figshare.20495955
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Shi, C., Goodall, M., Dumville, J. C., Hill, J. E., Norman, G., Hamer, O., Clegg, A., Watkins, C. L., Georgiou, G., Hodkinson, A., et al. (2022) · Figshare · doi:10.6084/m9.figshare.20495988
Shi, C., Goodall, M., Dumville, J. C., Hill, J. E., Norman, G., Hamer, O., Clegg, A., Watkins, C. L., Georgiou, G., Hodkinson, A., et al. (2022) · Figshare · doi:10.6084/m9.figshare.20495982
Shi, C., Goodall, M., Dumville, J. C., Hill, J. E., Norman, G., Hamer, O., Clegg, A., Watkins, C. L., Georgiou, G., Hodkinson, A., et al. (2022) · Figshare · doi:10.6084/m9.figshare.20495970
Shi, C., Goodall, M., Dumville, J. C., Hill, J. E., Norman, G., Hamer, O., Clegg, A., Watkins, C. L., Georgiou, G., Hodkinson, A., et al. (2022) · Figshare · doi:10.6084/m9.figshare.20495949
Shi, C., Goodall, M., Dumville, J. C., Hill, J. E., Norman, G., Hamer, O., Clegg, A., Watkins, C. L., Georgiou, G., Hodkinson, A., et al. (2022) · Figshare · doi:10.6084/m9.figshare.20495973
Shi, C., Goodall, M., Dumville, J. C., Hill, J. E., Norman, G., Hamer, O., Clegg, A., Watkins, C. L., Georgiou, G., Hodkinson, A., et al. (2022) · Figshare · doi:10.6084/m9.figshare.20495976
Shi, C., Goodall, M., Dumville, J. C., Hill, J. E., Norman, G., Hamer, O., Clegg, A., Watkins, C. L., Georgiou, G., Hodkinson, A., et al. (2022) · Figshare · doi:10.6084/m9.figshare.20495946
Shi, C., Goodall, M., Dumville, J. C., Hill, J. E., Norman, G., Hamer, O., Clegg, A., Watkins, C. L., Georgiou, G., Hodkinson, A., et al. (2022) · Figshare · doi:10.6084/m9.figshare.20495937
Shi, C., Goodall, M., Dumville, J. C., Hill, J. E., Norman, G., Hamer, O., Clegg, A., Watkins, C. L., Georgiou, G., Hodkinson, A., et al. (2022) · Figshare · doi:10.6084/m9.figshare.20495991
Shi, C., Goodall, M., Dumville, J. C., Hill, J. E., Norman, G., Hamer, O., Clegg, A., Watkins, C. L., Georgiou, G., Hodkinson, A., et al. (2022) · Figshare · doi:10.6084/m9.figshare.20495985
Shi, C., Goodall, M., Dumville, J. C., Hill, J. E., Norman, G., Hamer, O., Clegg, A., Watkins, C. L., Georgiou, G., Hodkinson, A., et al. (2022) · Figshare · doi:10.6084/m9.figshare.20495994
Sore Throat and Neck Pain Associated with Diaphragmatic Pacing
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- Authors
- Smyth, R. J., D'Urzo, A. D., Slutsky, A. S., Galko, B. M., & Rebuck, A. S.
- ORCID
- Slutsky, A. S.
- Venue
- Journal of Applied Physiology
- Publisher
- American Physiological Society
- Published
- 1986-02-01
- Volume
- 60
- Issue
- 2
- Pages
- 716-719
- ISSN
- 0161-7567 (ISSN-L)
- 8750-7587
- 1522-1601
- OpenAlex
- W2275571589
- Cited by
- 80
- References
- 0
- Citations by year
- 2024: 1 · 2022: 21 · 2021: 1 · 2020: 1 · 2019: 1 · 2016: 1 · 2013: 4 · 2012: 1
- FWCI
- 7.86
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Applied Physiology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
- Physical Sciences › Engineering › Biomedical Engineering › Non-Invasive Vital Sign Monitoring
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › High Altitude and Hypoxia
- Keywords
- ear oximetry, arterial oxygen saturation, hypoxia, physical activity, arterial blood gases
- MeSH terms
- Adult, Hypoxia, Blood Gas Analysis, Ear, Physical Exertion, Female, Humans, Male, Oximetry, Oxygen
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