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.
| Original language | English |
|---|---|
| Article number | 300001 |
| Journal | Connected Health And Telemedicine |
| Volume | 3 |
| Online published | 19 Feb 2024 |
| DOIs | |
| Publication status | Published - 2024 |
Funding
This work was supported by the ITC-InnoHK grant to establish Hong Kong Center for Cerebro-cardiovascular Health Engineering (COCHE) with Professor Yuanting Zhang as principal investigator and City University of Hong Kong (CityU) starting up grant to Professor Yuanting Zhang.
Publisher's Copyright Statement
- This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/