Journal
SENSORS
Volume 19, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/s19010118
Keywords
oxygen saturation (SpO(2)); green and orange illuminations; optoelectronic patch sensor (mOEPS); pulse oximetry; physical movement
Funding
- EPSRC CDT-Enabling Technologies
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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.
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