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Photoplethysmography (PPG) emerges as a non-invasive technique for measuring volumetric changes in biological tissues by detecting variations in light absorption. This technique captures the amount of light absorbed by biological tissue, closely related to changes in blood volume around the area of interest. PPG has become a valuable tool in physiological monitoring, enabling the non-invasive and continuous estimation of parameters such as heart rate and oxygen saturation. In this study, a system is proposed for the continuous and real-time estimation of these physiological parameters using the PPG technique. The focus is on developing a prototype that integrates a MAX30101 sensor capable of capturing samples of red and infrared light reflected by changes in blood. Additionally, a wireless transmission system is implemented using the MQTT protocol and a local server for efficient data communication. The preliminary results obtained indicate a significant correlation corresponding to average values greater than 0.8, between the PPG signals recorded by the sensor and a reference system (BIOPAC MP36), thus supporting the accuracy of heart rate and oxygen saturation estimations. Furthermore, areas for improvement are identified for future work, with a particular focus on optimizing parameter estimation accuracy and signal acquisition. This study represents a step forward in the development of non-invasive and highly accurate physiological monitoring systems, with potential applications in clinical and home monitoring environments.

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Prototype of a Wireless Wearable Acquisition System for Continuous and Real-Time Monitoring of Heart Rate and Arterial Oxygen Saturation Based on Photoplethysmography

  • 会议论文

  • 发表日期：

    2025年

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  • Luis Edvin Chávez-Colunga,
  • Aldo Rodrigo Mejía-Rodríguez,
  • Bersaín Alexander Reyes

摘要

Photoplethysmography (PPG) emerges as a non-invasive technique for measuring volumetric changes in biological tissues by detecting variations in light absorption. This technique captures the amount of light absorbed by biological tissue, closely related to changes in blood volume around the area of interest. PPG has become a valuable tool in physiological monitoring, enabling the non-invasive and continuous estimation of parameters such as heart rate and oxygen saturation. In this study, a system is proposed for the continuous and real-time estimation of these physiological parameters using the PPG technique. The focus is on developing a prototype that integrates a MAX30101 sensor capable of capturing samples of red and infrared light reflected by changes in blood. Additionally, a wireless transmission system is implemented using the MQTT protocol and a local server for efficient data communication. The preliminary results obtained indicate a significant correlation corresponding to average values greater than 0.8, between the PPG signals recorded by the sensor and a reference system (BIOPAC MP36), thus supporting the accuracy of heart rate and oxygen saturation estimations. Furthermore, areas for improvement are identified for future work, with a particular focus on optimizing parameter estimation accuracy and signal acquisition. This study represents a step forward in the development of non-invasive and highly accurate physiological monitoring systems, with potential applications in clinical and home monitoring environments.