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Open AccessArticle

Oxygen Saturation Measurements from Green and Orange Illuminations of Multi-Wavelength Optoelectronic Patch Sensors

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Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Ashby Road, Loughborough, Leicestershire LE11 3TU, UK
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School of Sport, Exercise and Health Sciences, Loughborough University, Ashby Road, Loughborough, Leicestershire LE11 3TU, UK
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School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China
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Author to whom correspondence should be addressed.
Sensors 2019, 19(1), 118; https://doi.org/10.3390/s19010118
Received: 21 October 2018 / Revised: 6 December 2018 / Accepted: 20 December 2018 / Published: 31 December 2018
(This article belongs to the Section Biosensors)
Photoplethysmography (PPG) based pulse oximetry devices normally use red and infrared illuminations to obtain oxygen saturation (SpO 2 ) readings. In addition, the presence of motion artefacts severely restricts the utility of pulse oximetry physiological measurements. In the current study, a combination of green and orange illuminations from a multi-wavelength optoelectronic patch sensor (mOEPS) was investigated in order to improve robustness to subjects’ movements in the extraction of SpO 2 measurement. The experimental protocol with 31 healthy subjects was divided into two sub-protocols, and was designed to determine SpO 2 measurement. The datasets for the first sub-protocol were collected from 15 subjects at rest, with the subjects free to move their hands. The datasets for the second sub-protocol with 16 subjects were collected during cycling and walking exercises. The results showed good agreement with SpO 2 measurements (r = 0.98) in both sub-protocols. The outcomes promise a robust and cost-effective approach of physiological monitoring with the prospect of providing health monitoring that does not restrict user physical movements. View Full-Text
Keywords: oxygen saturation (SpO2); green and orange illuminations; optoelectronic patch sensor (mOEPS); pulse oximetry; physical movement oxygen saturation (SpO2); green and orange illuminations; optoelectronic patch sensor (mOEPS); pulse oximetry; physical movement
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Alharbi, S.; Hu, S.; Mulvaney, D.; Barrett, L.; Yan, L.; Blanos, P.; Elsahar, Y.; Adema, S. Oxygen Saturation Measurements from Green and Orange Illuminations of Multi-Wavelength Optoelectronic Patch Sensors. Sensors 2019, 19, 118.

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