A low-cost system for continuous vital sign monitoring using the technology behind pulse-oximeters

Research output: Unpublished contribution to conferencePoster


Photoplethysmography (PPG) is a non-invasive technique that by means of light interactionwith the skin, allows extracting physiological parameters such as heart rate orblood oxygen saturation, among others. Due to factors such as body location, movement artifacts, contact pressure or temperature, the PPG signal gets easily distorted. This distortion limits the use of this technique for constant monitoring. In this study, it is presented novel PPG sensor structures that aim to improve the acquisition robustness so that photoplethysmography can be used for constant multi-modal physiological sensing. Following the ’banana region’ theory, that defines the interaction of light with skin, the
source-emitter distances and the number of components in the sensor were optimized for green and red light. Additionally, it is suggested that the sternum would be the ideal body location for constant monitoring.
Original languageEnglish
Publication statusPublished - 29 Nov 2019
Event18th National Day on Biomedical Engineering - The Royal Academies for Science and the Arts of Belgium, Brussels, Brussels, Belgium
Duration: 29 Nov 201829 Nov 2019
Conference number: 18th


Conference18th National Day on Biomedical Engineering
Abbreviated titleNCBME


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