Jingjing Luo
ABSTRACT
Background: Nowadays, Cardiovascular disease is a severe threat to human health. It is necessary to monitor the cardiovascular parameters such as blood oxygen saturation reliably and conveniently. Non-contact measurement has been widely studied. However, some inevitable factors limit the use of the platform and even lead to inaccurate estimation. Hence, this study proposed a new method to estimate blood oxygen saturation.
Methods: This paper introduced a new IPPG device consisting of a dual-wavelength light source system, an enclosed illumination chamber and an RGB camera. In order to get a high-precision SpO2 calculation model, the data obtained and processed from the system are compared to the output of a traditional figure blood volume pulse sensor that was employed on 20 subjects at the same time. The most suitable region of interest (ROI) area was determined based on previous research.
Findings: The comparison showed that the data from the new IPPG system is consistent and comparable with the traditional pulse oximeter. Compared to other IPPG-based measuring methods, our new IPPG device can remove the motion artifacts caused by body movement well. What's more, the consistency of the environment was maintained and reduce the interference of the external environment during the experiment because of the device.
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