A multi-channel photoplethysmography array with contact-force regulation for tonoarteriographic imaging
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
| Original language | English |
|---|---|
| Article number | 300001 |
| Journal / Publication | Connected Health And Telemedicine |
| Volume | 3 |
| Online published | 19 Feb 2024 |
| Publication status | Published - 2024 |
Link(s)
| DOI | DOI |
|---|---|
| Attachment(s) | Documents
Publisher's Copyright Statement
|
| Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(ba63e77f-5eaf-473d-acf8-dce5a72a1795).html |
Abstract
Aim: Photoplethysmography (PPG) has gained widespread popularity as a non-invasive method for potential cuffless blood pressure (BP) measurement in smart devices. However, the accuracy of PPG-based devices is often hindered by motion artifacts, site variability, and inconsistent contact force (CF). This study aims to investigate the influence of CF variations on PPG signals.
Methods: To address these challenges, we present a novel approach involving a multi-channel PPG array integrated with CF regulation in the form of a wearable wristband. This platform enables the visualization of regional PPG/BP distribution while simultaneously monitoring CF. Moreover, our research explored the relationship between PPG waveform characteristics and CF during wrist extension.
Results: The results of this study reveal that the PPG amplitude (PPGA) and the b/a ratios, computed from the second derivative peaks of the PPG AC pulse wave, exhibit inconsistency in reaction to CF variations. Notably, a shape correlation coefficient of 0.65069 between normalized PPG and flipped CF sheds light on how changes in posture affect PPG measurements.
Conclusions: The proposed platform shows promise in mitigating the effects of CF and spatial positioning on PPG,thereby improving measurement precision and offering a novel approach to image tonoarteriographic (TAG)activities for continuous hypertension management.
© The Author(s) 2024.
Methods: To address these challenges, we present a novel approach involving a multi-channel PPG array integrated with CF regulation in the form of a wearable wristband. This platform enables the visualization of regional PPG/BP distribution while simultaneously monitoring CF. Moreover, our research explored the relationship between PPG waveform characteristics and CF during wrist extension.
Results: The results of this study reveal that the PPG amplitude (PPGA) and the b/a ratios, computed from the second derivative peaks of the PPG AC pulse wave, exhibit inconsistency in reaction to CF variations. Notably, a shape correlation coefficient of 0.65069 between normalized PPG and flipped CF sheds light on how changes in posture affect PPG measurements.
Conclusions: The proposed platform shows promise in mitigating the effects of CF and spatial positioning on PPG,thereby improving measurement precision and offering a novel approach to image tonoarteriographic (TAG)activities for continuous hypertension management.
© The Author(s) 2024.
Research Area(s)
Citation Format(s)
A multi-channel photoplethysmography array with contact-force regulation for tonoarteriographic imaging. / Liu, Zi-Jun; Xiang, Ting; Zhou, Ru-Shuang et al.
In: Connected Health And Telemedicine, Vol. 3, 300001, 2024.
In: Connected Health And Telemedicine, Vol. 3, 300001, 2024.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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