基于智能手机平台的心电监测与管理系统设计与实现

Design implementation and of ECG monitoring and management system based on smartphone platform

目的 :为了便于在日常生活和工作环境下监测心电并将心电数据发送给医生进行诊断,设计并实现一种基于智能手机平台的心电监测与管理系统。方法:该系统包括心电采集装置与智能手机App 2个部分。心电采集装置以MSP430F149单片机为核心,采用右腿驱动、有源滤波器、双仪表放大器、移动平均算法等有效提取心电信号,采用差分阈值法准确检测R波并计算心率,利用蓝牙4.0模块将心电数据发送到智能手机。智能手机App的开发基于跨平台移动应用开发框架Cordova,利用Cordova插件、Java Script、HTML5、CSS实现接收心电采集装置发送的数据、绘制与保存心电图、显示心率和提示异常、记录与回放心电数据、通过移动医疗App与社交App将心电数据发送给医生等操作,使医生可查看和分析收到的心电数据并向用户反馈防治和就医建议。结果:与医院心电图机比较,心率、P波时限、QRS时限、QT时限相对误差分别为2.7%、4.5%、4.3%、3.3%,且这4个指标均具有显著相关性,相关系数分别为0.955、0.948、0.91、0.834,P值均小于0.05。该系统在充满电情况下可正常工作8 h。结论:该系统功耗低、准确性好、噪声低、成本低、体积小、质量轻、安全可靠、使用与维护简单,通过该系统可以及时掌握使用者的心电情况。

Objective To develop an ECG monitoring and management system based on the smartphone platform to transmit ECG data to the doctor in daily life or working environment. Methods The system was composed of an ECG signal acquisition device and a smartphone App. The ECG signal acquisition device used MSP430F149 microcontroller as the core unit, which executed ECG signal extraction by adopting right leg drive, active filters, dual instrumentation amplifier and moving average algorithm, applied differential threshold method to accurately detecting R wave, calculated heart rate and then sent ECG data to the smartphone through Bluetooth 4.0 module. The smartphone App was developed based on cross-platform mobile development framework Cordova, and used Cordova plugins, Java Script, HTML5 and CSS to receive the data from the acquisition device, draw and store ECG, show heart rate and remind abnormalities in heart rate as well as to transmit ECG data to the doctor through the mobile medicine App and social App. Then the doctor provided advices on prevention,treatment and etc after analyzing the received data. Results Compared with the ECG machine, the system had the relative errors of heart rate, P duration, QRS duration and QT duration being 2.7%, 4.5%, 4.3% and 3.3% respectively. All the above four parameters having significant correlations, and the correlation parameters were 0.955, 0.948, 0.91 and 0.834 respectively（P〈0.05）. The system had 8-h endurance in case of being fully charged. Conclusion The system gains advantages in power consumption, accuracy, noise, cost, volume, weight, safety, reliability as well as easy operation and maintenance, and facilitates the ECG conditions to be mastered timely by the doctor.