Design and Research of Continuous Blood Pressure Monitoring System Based on LoRa

Blood pressure is an important physiological parameter of human body, can reflect the function of heart and blood vessel of human body, and is an important basis for clinical diagnosis of disease and pre-judgment of cardiovascular disease. Since the blood pressure parameters are affected by many factors, such as physical condition, environmental condition and physiological characteristics, the result of single measurement is very different, and the continuous measurement method can measure blood pressure in every cardiac cycle and make more sense in clinical and research. In order to meet this requirement, a system for collecting waveform signals and realizing continuous blood pressure measurement by photoelectric sensors is designed in this paper. At the same time, the measurement results can be transmitted to the base station through Lora and uploaded to the server, which is easy to access in real time. The error of the blood pressure measurement is in accordance with the requirements of the standard deviation of not more than 8mmHg recommended by the AAMI, and can be applied to the monitoring scene of the vital signs and parameters of the elderly and the hospital.