Towards continuous blood pressure monitoring using speckle plethysmography

Ilde Lorato; Jorge Herranz Olazabal; Jesse Kling; Evelien Hermeling

doi:10.1117/12.3001627

12 March 2024 Towards continuous blood pressure monitoring using speckle plethysmography

Ilde Lorato, Jorge Herranz Olazabal, Jesse Kling, Evelien Hermeling

Proceedings Volume 12838, Biophotonics in Exercise Science, Sports Medicine, Health Monitoring Technologies, and Wearables V; 128380A (2024) https://doi.org/10.1117/12.3001627
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

Speckle Plethysmography (SPG) is recently gaining interest as an addition to Photoplethysmography (PPG), due to higher Signal-to-Noise Ratio and the reduced sensitivity to both ambient light changes and variation in skin melanin content. SPG can be obtained by analyzing the spatial changes in the speckle pattern generated by a coherent light source over time. Continuous Blood Pressure (BP) monitoring is a particularly relevant topic in the biomedical domain as elevated BP is a major risk factor for cardiovascular diseases. Noninvasive methodologies are being researched as an alternative to cuff-based methods, which are considered uncomfortable and cumbersome. Typical approaches are Pulse Arrival Time (PAT), using Electrocardiogram (ECG) signals and PPG, or Pulse Waveform Analysis (PWA), by analyzing PPG’s morphological features. These approaches, however, still lack accuracy and require personalized BP models. SPG could offer better performance for this type of application. Therefore, in this work, ten subjects were monitored using a contact SPG system synchronized with simultaneous reference recordings of ECG, PPG, and BP signals. PAT and PWA features were calculated from SPG and ECG. The same features were calculated from PPG, which were used for benchmarking purposes. Linear regression analysis was performed between the extracted features and the reference BP. In addition, the inter-subject variability in the feature BP-slope and the correlation coefficients were analyzed. The results show a high correlation between the SPG features and BP. Furthermore, the SPG features resulted in a reduced inter-subject variability compared to the PPG-derived features, possibly indicating that SPG could be used for a generalized BP model.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ilde Lorato, Jorge Herranz Olazabal, Jesse Kling, and Evelien Hermeling "Towards continuous blood pressure monitoring using speckle plethysmography", Proc. SPIE 12838, Biophotonics in Exercise Science, Sports Medicine, Health Monitoring Technologies, and Wearables V, 128380A (12 March 2024); https://doi.org/10.1117/12.3001627

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available