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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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Overview of OEPS electronic system for continuous physiological monitoring.
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biosensors-05-00288-f002: Overview of OEPS electronic system for continuous physiological monitoring.

Mentions: The OEPS is a miniaturized and wearable device [28]. It was constructed for continuous measurement of blood volume changes in the vessels, corresponding to pulsations of the heart. The OEPS operates in reflectance mode (light source and detector are on the same surface) and is suitable for being attached or adhered to different locations on the human body, for instance, forehead, palm, earlobe and wrist as shown in Figure 1. The schematic of the OEPS consisting of an opto-electronic sensor, a 3MA and a body temperature sensor, as in presented Figure 2, shows all integrated within one piece of electronic printed circuit board (PCB). The opto-electronic sensor uses multi-wavelength illumination sources, including, green 525 nm, red 660 nm and infrared (IR) 990 nm (JMSienna Co., Ltd), and a low-profile photodiode (BPW34SR18R, Osram, GmbH).


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)

Overview of OEPS electronic system for continuous physiological monitoring.
© Copyright Policy
Related In: Results  -  Collection

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

biosensors-05-00288-f002: Overview of OEPS electronic system for continuous physiological monitoring.
Mentions: The OEPS is a miniaturized and wearable device [28]. It was constructed for continuous measurement of blood volume changes in the vessels, corresponding to pulsations of the heart. The OEPS operates in reflectance mode (light source and detector are on the same surface) and is suitable for being attached or adhered to different locations on the human body, for instance, forehead, palm, earlobe and wrist as shown in Figure 1. The schematic of the OEPS consisting of an opto-electronic sensor, a 3MA and a body temperature sensor, as in presented Figure 2, shows all integrated within one piece of electronic printed circuit board (PCB). The opto-electronic sensor uses multi-wavelength illumination sources, including, green 525 nm, red 660 nm and infrared (IR) 990 nm (JMSienna Co., Ltd), and a low-profile photodiode (BPW34SR18R, Osram, GmbH).

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