Limits...
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.

Show MeSH
A schematic diagram of physiological monitoring protocol with five different exercises.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4493550&req=5

biosensors-05-00288-f004: A schematic diagram of physiological monitoring protocol with five different exercises.

Mentions: Sixteen subjects were divided into four groups, where the subjects in each group had the OEPS placed on a different measuring site, namely, palm, forehead, finger or earlobe. Meanwhile a commercial reflectance contact pulse oximetry probe (Nellcor probe, NellcorTM Max-FastTM, COVIDIEN) and a cuff blood pressure meter (Omron blood pressure meter, M6 COMFORT OMRON Inc., Chicago, IL, USA) were placed on the other side of the subject’s body. The 3MA was attached on the back of the OEPS in order to be adjacent to the optical signal-capturing site. The subjects were asked to perform a variety of designated physical activities whilst individual recordings were taken for each of these. Specifically, the recordings were taken whilst the subjects were standing at rest, sitting at rest, walking, running and cycling on the gym cycle. Recordings of 30 s were taken for each individual exercise, with the exception of the cycling exercises, where the data were recorded for a total of 120 s. The increments of cycling exercises were applied in the protocol at the speed from 20 km/h up to 35 km/h: the first recording is 60 s, followed by another 60 s recording at the maximum speed of 35 km/h. Figure 4 shows the protocol of entire exercise procedures as performed by subjects.


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)

A schematic diagram of physiological monitoring protocol with five different exercises.
© Copyright Policy
Related In: Results  -  Collection

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

biosensors-05-00288-f004: A schematic diagram of physiological monitoring protocol with five different exercises.
Mentions: Sixteen subjects were divided into four groups, where the subjects in each group had the OEPS placed on a different measuring site, namely, palm, forehead, finger or earlobe. Meanwhile a commercial reflectance contact pulse oximetry probe (Nellcor probe, NellcorTM Max-FastTM, COVIDIEN) and a cuff blood pressure meter (Omron blood pressure meter, M6 COMFORT OMRON Inc., Chicago, IL, USA) were placed on the other side of the subject’s body. The 3MA was attached on the back of the OEPS in order to be adjacent to the optical signal-capturing site. The subjects were asked to perform a variety of designated physical activities whilst individual recordings were taken for each of these. Specifically, the recordings were taken whilst the subjects were standing at rest, sitting at rest, walking, running and cycling on the gym cycle. Recordings of 30 s were taken for each individual exercise, with the exception of the cycling exercises, where the data were recorded for a total of 120 s. The increments of cycling exercises were applied in the protocol at the speed from 20 km/h up to 35 km/h: the first recording is 60 s, followed by another 60 s recording at the maximum speed of 35 km/h. Figure 4 shows the protocol of entire exercise procedures as performed by subjects.

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