Research Article
Intraoral Monitoring of Photoplethysmogram Signal to Estimate Cardiorespiratory Parameters
@INPROCEEDINGS{10.1007/978-3-030-76066-3_3, author={Shibam Debbarma and Sharmistha Bhadra}, title={Intraoral Monitoring of Photoplethysmogram Signal to Estimate Cardiorespiratory Parameters}, proceedings={Wearables in Healthcare. Second EAI International Conference, HealthWear 2020, Virtual Event, December 10-11, 2020, Proceedings}, proceedings_a={HEALTHWEAR}, year={2021}, month={5}, keywords={Photoplethysmography Photoplethysmogram sensor Intraoral monitoring Heart Rate Blood oxygen saturation Breathing Sleep Apnea}, doi={10.1007/978-3-030-76066-3_3} }- Shibam Debbarma
Sharmistha Bhadra
Year: 2021
Intraoral Monitoring of Photoplethysmogram Signal to Estimate Cardiorespiratory Parameters
HEALTHWEAR
Springer
DOI: 10.1007/978-3-030-76066-3_3
Abstract
Photoplethysmograpghy (PPG) is a simple, non-invasive, optical method already known in clinical and home monitoring setups for its wide applications in cardiorespiratory measurements such as heart rate, breathing, and blood oxygen saturation (SpO2). Here, we present an intraoral measurement of such cardiorespiratory parameters using a photoplethysmogram (PPG) sensor. A reflective PPG sensor is placed inside the oral cavity, facing the buccal mucosa opposite to upper jaw, and PPG signal is obtained. The average heart rate, breathing signal and average SpO2variation are calculated from the intraoral PPG signal. Accuracy of the measured parameters are validated against standard monitoring methods: a commercial PPG sensor mounted on the left index fingertip to monitor heart rate and SpO2levels and a respiration monitoring belt worn around the diaphragm for breathing. Results obtained from subject’s tests show an average absolute error of 0.75% in heart rate measurement and 5.83% in breathing detection compared to standard references. Whereas, the average variation in SpO2levels are 2.41% and 1.35% from the intra-oral measurement and the reference measurement, respectively. Intraoral measurement of such cardiorespiratory parameters can have useful applications such as smart mandibular advancement devices to monitor sleep while treating patients with sleep apnea.
