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A Comparative Study of Physiological Monitoring with a Wearable Opto-Electronic Patch Sensor (OEPS) for Motion Reduction.

Alzahrani A, Hu S, Azorin-Peris V - Biosensors (Basel) (2015)

Bottom Line: The protocol involved 16 healthy subjects and was designed to test the features of OEPS, with emphasis on the effective reduction of motion artefacts through the utilization of a 3MA as a movement reference.The results show significant agreement between the heart rates from the reference measurements and the recovered signals.The outcome of the present work incites the prospects of OEPS on physiological monitoring during physical activities.

View Article: PubMed Central - PubMed

Affiliation: School of Electronic, Electrical and Systems Engineering, Loughborough University, Ashby Road, Loughborough, Leicestershire LE11 3TU, UK. A.Alzahrani@lboro.ac.uk.

ABSTRACT
This paper presents a comparative study in physiological monitoring between a wearable opto-electronic patch sensor (OEPS) comprising a three-axis Microelectromechanical systems (MEMs) accelerometer (3MA) and commercial devices. The study aims to effectively capture critical physiological parameters, for instance, oxygen saturation, heart rate, respiration rate and heart rate variability, as extracted from the pulsatile waveforms captured by OEPS against motion artefacts when using the commercial probe. The protocol involved 16 healthy subjects and was designed to test the features of OEPS, with emphasis on the effective reduction of motion artefacts through the utilization of a 3MA as a movement reference. The results show significant agreement between the heart rates from the reference measurements and the recovered signals. Significance of standard deviation and error of mean yield values of 2.27 and 0.65 beats per minute, respectively; and a high correlation (0.97) between the results of the commercial sensor and OEPS. T, Wilcoxon and Bland-Altman with 95% limit of agreement tests were also applied in the comparison of heart rates extracted from these sensors, yielding a mean difference (MD: 0.08). The outcome of the present work incites the prospects of OEPS on physiological monitoring during physical activities.

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Corrupted PPG signal, motion acceleration and recovered PPG signal.
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biosensors-05-00288-f011: Corrupted PPG signal, motion acceleration and recovered PPG signal.

Mentions: In order to determine the quality of the reconstruction of signals, the data was visually examined to determine whether a pulsatile waveform was consistent and correlated with the reference signal. Figure 10 shows: (1) a motion reference signal; (2) a corrupted PPG signal captured from a subject’s palm during fast walking exercise; and (3) the same PPG signal after applying automatic adaptive motion artefact cancellation. The pulse-pulse intervals (PPI) can be clearly seen in the recovered PPG signal with the presence of motion artefacts. From this PPI, the heart rate and heart rate variability can be measured. Figure 11 shows a motion acceleration reference, corrupted PPG signal (C_PPG) due to running movement and recovered PPG signal (R_PPG).


A Comparative Study of Physiological Monitoring with a Wearable Opto-Electronic Patch Sensor (OEPS) for Motion Reduction.

Alzahrani A, Hu S, Azorin-Peris V - Biosensors (Basel) (2015)

Corrupted PPG signal, motion acceleration and recovered PPG signal.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4493550&req=5

biosensors-05-00288-f011: Corrupted PPG signal, motion acceleration and recovered PPG signal.
Mentions: In order to determine the quality of the reconstruction of signals, the data was visually examined to determine whether a pulsatile waveform was consistent and correlated with the reference signal. Figure 10 shows: (1) a motion reference signal; (2) a corrupted PPG signal captured from a subject’s palm during fast walking exercise; and (3) the same PPG signal after applying automatic adaptive motion artefact cancellation. The pulse-pulse intervals (PPI) can be clearly seen in the recovered PPG signal with the presence of motion artefacts. From this PPI, the heart rate and heart rate variability can be measured. Figure 11 shows a motion acceleration reference, corrupted PPG signal (C_PPG) due to running movement and recovered PPG signal (R_PPG).

Bottom Line: The protocol involved 16 healthy subjects and was designed to test the features of OEPS, with emphasis on the effective reduction of motion artefacts through the utilization of a 3MA as a movement reference.The results show significant agreement between the heart rates from the reference measurements and the recovered signals.The outcome of the present work incites the prospects of OEPS on physiological monitoring during physical activities.

View Article: PubMed Central - PubMed

Affiliation: School of Electronic, Electrical and Systems Engineering, Loughborough University, Ashby Road, Loughborough, Leicestershire LE11 3TU, UK. A.Alzahrani@lboro.ac.uk.

ABSTRACT
This paper presents a comparative study in physiological monitoring between a wearable opto-electronic patch sensor (OEPS) comprising a three-axis Microelectromechanical systems (MEMs) accelerometer (3MA) and commercial devices. The study aims to effectively capture critical physiological parameters, for instance, oxygen saturation, heart rate, respiration rate and heart rate variability, as extracted from the pulsatile waveforms captured by OEPS against motion artefacts when using the commercial probe. The protocol involved 16 healthy subjects and was designed to test the features of OEPS, with emphasis on the effective reduction of motion artefacts through the utilization of a 3MA as a movement reference. The results show significant agreement between the heart rates from the reference measurements and the recovered signals. Significance of standard deviation and error of mean yield values of 2.27 and 0.65 beats per minute, respectively; and a high correlation (0.97) between the results of the commercial sensor and OEPS. T, Wilcoxon and Bland-Altman with 95% limit of agreement tests were also applied in the comparison of heart rates extracted from these sensors, yielding a mean difference (MD: 0.08). The outcome of the present work incites the prospects of OEPS on physiological monitoring during physical activities.

Show MeSH