The application and future development of pulse oximeters in monitoring human health

Abstract. With the rapid development of medical devices, wearable devices have stood out. Among them, pulse oximeters, as clinical applications, are rapidly expanding their use to fields such as fitness and daily life. Moreover, photoplethysmography (PPG) technology has shown broad application prospects in the field of medical devices. This paper introduces the composition structure and working principle of the pulse oximeter, which is an optical sensor based on the photoelectric capacitance pulse wave. Under non-invasive conditions, physiological parameters are obtained from different parts of the human skin surface to obtain PPG signal maps, and heart rate and blood oxygen saturation are calculated based on the signal maps. At the same time, the paper identifies that pulse oximeters have some shortcomings, so how to further improve the accuracy and real-time monitoring capability of pulse oximeters and how to enhance their performance and reliability are the future development trends, which are also discussed in this paper.