| Summary: | 碩士 === 國立交通大學 === 光電系統研究所 === 100 === Oxygen saturation is the key parameter in physiological monitoring. Continuous measurement of oxygen saturation level is especially important to aged people, pregnant women, neonates and patients in critical situations which can lead to severe hypoxia in human tissues. In past study, the noninvasive measurement of oxygen saturation is mainly implemented by standard oximeter combined with transmission probes. However, the heavy, huge, wired system and the limitation of measurement locations of transmission probes may result in inconvenience and difficulty in daily life use. Hence, we propose a light, miniature, wireless oxygen saturation monitoring system that can be compatible not only with the standard transmission probe but also the designed reflectance probe that enhances the flexibility of measurements at different locations. With the applied optical techniques of Near-infrared spectroscopy (NIRS) and Photoplethysmography (PPG), the oxygen saturation can be measured noninvasively. In this study, the validations of the proposed system are performed by normal breathing task and breath holding task and the results are compared with the standard oximeter. In normal breathing task via forehead, the results show average correlation 82.78% between the proposed system and standard oximeter. In breath holding task via finger, the results show average correlation 88.40% between the proposed system and standard oximeter. In breath holding task via forehead, the results show average correlation 83.06% between the proposed system and standard oximeter. In conclusion, the proposed system is reliable and can be applied conveniently in daily life.
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