An ECG Monitoring and Alarming System Based On Android Smart Phone

ECG monitoring in daily life is an important means of treating heart disease. To make it easier for the medical to monitor the ECG of their patients outside the hospital, we designed and developed an ECG monitoring and alarming system based on Android smart phone. In our system, an ECG device collects the ECG signal and transmits it to an Android phone. The Android phone detects alarms which come from the ECG devices. When alarms occur, Android phone will capture the ECG images and the details about the alarms, and sends them to the cloud Alarm Server (AS). Once received, AS push the messages to doctors’ phone, so the doctors could see the ECG images and alarm details on their mobile phone. In our system, high resolution ECG pictures are transmitted to doctors’ phone in a user-friendly way, which can help doctors keep track of their patient’s condition easily.

Design and Implementation of Long-Term Single-Lead ECG Monitor

Some heart diseases need long-term monitoring to diagnose. In this paper, we present a wearable single lead ECG monitoring device with low power consumption based on MSP430 and single-lead ECG front-end AD8232, which could acquire and store patient’s ECG data for 7 days continuously. This device is available for long-term wearing with a small volume. Also, it could detect user’s motion status with an acceleration sensor and supports Bluetooth 4.0 protocol. So it could be expanded to be a dynamic heart rate monitor and/or sleep quality monitor combined with smart phone. The device has huge potential of application for health care of human daily life.

Portable Wireless ECG Monitor with Fabric Electrodes

A portable and comfortable wireless ECG monitoring system composed of fabric electrodes and a monitoring terminal was proposed,which is essential to continuous ECG monitoring. The ECG signal acquired could be processed and stored in the monitoring terminal. The HR was got and transmitted to any devices through a Bluetooth interface. The experimental results in resting and walking showed that the ECG monitoring system could acquire the ECG signal steadily,continuously and precisely.

Review on Development and Application of Fabric Electrodes in Electrocardiogram Monitoring Garments

Cardiovascular disease persists as the primary cause of human mortality,significantly impacting healthy life expectancy.The routine electrocardiogram(ECG)stands out as a pivotal noninvasive diagnostic tool for identifying arrhythmias.The evolving landscape of fabric electrodes,specifically designed for the prolonged monitoring of human ECG signals,is the focus of this research.Adhering to the preferred reporting items for systematic reviews and meta-analyses(PRISMA)statement and assimilating data from 81 pertinent studies sourced from reputable databases,the research conducts a comprehensive systematic review and meta-analysis on the materials,fabric structures and preparation methods of fabric electrodes in the existing literature.It provides a nuanced assessment of the advantages and disadvantages of diverse textile materials and structures,elucidating their impacts on the stability of biomonitoring signals.Furthermore,the study outlines current developmental constraints and future trajectories for fabric electrodes.These insights could serve as essential guidance for ECG monitoring system designers,aiding them in the selection of materials that optimize the measurement of biopotential signals.

基于JAVA手机便携式心电监护分析仪的ECG信号采集模块设计

目的:设计一种基于JAVA手机的便携式心电监护仪的心电信号采集模块。方法:心电采集模块采用低功耗51单片机为控制核心,通过心电信号的采集、放大、滤波、A/D转换以及红外通讯接口5个模块,实现心电信号的采集及与JAVA移动手机之间的通信。结果:设计的采集模块具有高输入阻抗、高共模抑制比、低噪声、增益可控等优点,可实现心电信号无失真采集和与手机间进行红外线通信。结论:该心电信号采集模块成本低、体积小、耗电少,适合患者自身携带和医务工作者使用。

ECG监护仪前置放大电路的设计

基于传统的仪用放大器基本框架,设计了一种新的可用于心电信号放大的前置放大器。在3 dB带宽范围内,该放大器的增益达到了48.3 dB。等效的输出噪声电压值为5.34 nV/Hz。根据生物电信号采集的特点,通过增加右腿驱动电路,提高了放大器的共模抑制比,对被测的生物体具有更安全的保护作用。仿真结果表明该放大器在增益、频率响应特性、共模抑制比等性能参数方面符合美国心脏协会(AHA)的建议要求,确保了输出心电信号的低失真,可用于ECG监护仪中。

远程心电监护中ECG信号的提取

远程心电监护中采集到的心电信号往往包含较严重的噪声干扰,给医生的诊断带来了困难,针对这一问题,介绍了一种基于人工神经网络和自适应噪声抵消的ECG信号自动提取方法;用一个三层BP网络来代替自适应抵消中常用的线性滤波器,对原始ECG信号进行自适应滤波。通过Matlab/Simulink进行仿真;结果表明该方法能够很好地适应噪声的非线性特性,用于远程心电监护中强噪声背景下的ECG信号提取,取得了令人满意的效果。

A wearable real-time telemonitoring electrocardiogram device compared with traditional Holter monitoring

Arrhythmias are very common in the healthy populations as well as patients with cardiovascular diseases.Among them,atrial fibrillation(AF)and malignant ventricular arrhythmias are usually associated with some clinical events.Early diagnosis of arrhythmias,particularly AF and ventricular arrhythmias,is very important for the treatment and prognosis of patients.Holter is a gold standard commonly recommended for noninvasive detection of paroxysmal arrhythmia.However,it has some shortcomings such as fixed detection timings,delayed report and inability of remote real-time detection.To deal with such problems,we designed and applied a new wearable 72-hour triple-lead H3-electrocardiogram(ECG)device with a remote cloud-based ECG platform and an expertsupporting system.In this study,31 patients were recruited and 24-hour synchronous ECG data by H3-ECG and Holter were recorded.In the H3-ECG group,ECG signals were transmitted using remote real-time modes,and confirmed reports were made by doctors in the remote expert-supporting system,while the traditional modes and detection systems were used in the Holter group.The results showed no significant differences between the two groups in 24-hour total heart rate(HR),averaged HR,maximum HR,minimum HR,premature atrial complexes(PACs)and premature ventricular complexes(PVCs)(P>0.05).The sensitivity and specificity of capture and remote automatic cardiac events detection of PACs,PVCs,and AF by H3-ECG were 93%and 99%,98%and 99%,94%and 98%,respectively.Therefore,the long-term limb triple-lead H3-ECG device can be utilized for domiciliary ECG self-monitoring and remote management of patients with common arrhythmia under medical supervision.

Evaluation of Pencil Lead Based Electrodes for Electrocardiogram Monitoring in Hot Spring

Electrocardiogram(ECG)electrodes are conductive pads applied to the skin to measure cardiac activity.Ag/AgCl electrodes are the commercial product which widely used to obtain ECGs.When monitoring the ECG in a hot spring,Ag/AgCl electrodes must be waterproofed;however,this is time-consuming,and the adhesive may tear the skin on removal.For solving the problem,we developed the carbon pencil lead(CPL)electrodes for use in hot springs.Both CPL and Ag/AgCl electrodes were connected to ECG100C’s cables.The Performance was evaluated in three conditions as following:hot spring water with and without bubble,and in cold water.In each environment,the procedure was followed by three different protocols that are recording from the dry condition,hot spring water immersion with and without movement,post hot spring water condition.Under dry and wet conditions,both electrodes can obtain the waveform of the ECG signal in which all PQRST waves were identifiable.Nevertheless,the signal quality of both types of electrodes was different in water immersion with and without movement.The overall morphology obtained by Ag/AgCl electrodes was unstable higher than that of CPL electrodes in immersion without movement condition.The CPL electrodes provided better ECG waveform quality compared to Ag/AgCl electrodes in which the ECG signal had high waveforms distortion in water immersion with movement condition.

ECG监护仪设计回顾与发展

随着电子技术的发展,心电监护仪系统的设计、性能、尺寸、使用的便捷性等已经发生了很大的变化。本文介绍了ECG监护仪的各组成部分,即助电极、模拟前端、控制处理单元以及显示和分析方法的最新技术进展,并指出今后的发展方向。

ECG-6511心电图机各电位器的作用及调整

ECG-6511心电图机由于稳定、方便而被广泛使用,本文介绍了各电位器的作用和调节方法,以改善其技术性能。

便携家庭式远程定位ECG监测预警系统的设计与实现

针对远程定位ECG监测预警系统的需求,设计了一套家庭式心电实时监测预警系统。系统包括远程监测平台与移动预警端,远程监测平台采用Lab View编写了ECG波形显示与回放程序,并利用自主开发的心电采集设备实现了心电分析与监测预警等功能。移动预警端将ECG采集模块与Android手机相结合,实现了ECG信号的实时监控与远程定位等功能。实测结果表明,系统准确率在94%以上,携带方便,在出现心率紊乱等症状时,可及时发送报警信息,帮助患者得到医疗救助。

基于整数小波变换和嵌入式编码的ECG信号压缩

针对一般的有损压缩方法不能同时实现无损压缩的情况,实现了一类基于整数小波变换和嵌入式编码的心电数据压缩方法,不仅能够进行有损压缩,也能够实现无损压缩。并且比较了EZW、SPIHT和SPECK三种主要的嵌入式编码算法的性能优劣,为移动心电监护以实时性、信号质量和编码可伸缩性为根据选择数据压缩方法提供了参考。

远程中央监护系统ECG导联辨识附件的设计

目的分析远程中央监护系统的工作原理,探讨解决临床使用中存在的问题。方法应用生物医学工程专业知识设计精致便携的ECG导联辨识附件,可以迅速检测患者的电极-皮肤接触电阻,显示心电导联的工作状态。结果ECG导联辨识附件的设计有效解决了临床医务工作人员不能准确判断心电导联与患者皮肤是否正常连接的问题,辅助医护工作人员对患者进行准确及时的救护。结论ECG导联辨识附件辅助远程中央监护系统的应用具有很重要的临床意义,能够促进医院获得最大经济效益和社会效益。

EPIC ECG穿戴装置的心脏疾病预警算法研究

EPIC ECG穿戴装置是一种基于新型电势测量元件的非接触电机的穿戴心电获取装置。首先提出了穿戴式心电获取装置整体架构;其次基于心拍的数值表征参数和形态,在已有的支持向量机算法对心电信号进行预测分类的基础上,重点研究如何利用专家库和轮廓模式识别结合的综合特征向量提取方法对分类准确度进行改进;最后利用MIT-BIH数据库数据进行了实验验证。实验结果表明,综合特征向量的应用提高了SVM的分类准确度。

基于IoT的多导联ECG监测系统设计

针对家庭及社区的医疗监护系统需求,设计了一种基于物联网(Internet of Thing,IoT)的多导联心电信号(electrocardiogram,ECG)实时监测系统。本系统利用ADS1298前端实时采集ECG,通过蓝牙和Wi-Fi模块将信号分别发送给Android客户端和云服务器。在客户端中实现了ECG数据接收、数据解码、中值滤波、LMS自适应限波、QRS波检测以及ECG波形和诊断结果的显示;在云服务器中建立了数据库,用于保存用户的心电数据;还挂载了基于卷积神经网络的疾病诊断模型,可对用户心脏健康状态进行实时监测。

基于ECG信号的高精度血糖监测

连续血糖监测在糖尿病管理中具有重要的意义.目前糖尿病患者主要通过指尖采血或植入式微创传感器监测血糖,但上述方法存在疼痛、成本昂贵、易感染等问题,因此,无创监测是实现连续血糖监测的理想技术.本文利用心电(ECG)信号,提出了一种血糖水平无创监测的方法:通过获取12名志愿者共60 d 756160个ECG周期信号,利用递归滤波器实现ECG信号的滤波,并采用卷积神经网络和长短期记忆网络相结合(CNN-LSTM)的方法,实现了血糖水平的十分类监测,并通过实验探索了个体建模和群体建模2种建模方式的差异.结果表明,在个体建模和群体建模的条件下,血糖监测精确率分别约达到80%和88%.其中群体建模10分类的F1值可达到0.95、0.88、0.91、0.85、0.92、0.88、0.86、0.86、0.87和0.86.研究表明,本文提出的基于ECG的无创血糖监测方法为实现血糖水平的实时、精准监测提供了一种有力的理论支撑与技术指导.

应用于便携式ECG的低耗能高精度带隙基准电路设计

为满足便携心电监测设备中低功耗的应用要求,设计一种应用于便携式心电监测芯片的具有低功耗和高精度特性的带隙基准电路。通过采用工作于亚阈值区域的CMOS晶体管,电路取得了超低功耗。并采用高阶温度曲线补偿技术,提高了电路输出基准电压的精准度。电路采用标准CMOS 180 nm工艺设计,仿真结果表明,在-40～100℃的温度范围内输出基准电压为1.16 V,温度系数约为3.3 ppm/℃,在1.3 V电源电压下功耗为6.2μW。

Monitoring Biosignals with Low Cost Wearable Sensors

With the increase of aging population, we have been witnessing a decline in the quality of life influenced by numerous social, cultural and economic factors. Several studies have addressed these facts and some emerging technologies are capable of monitoring and anticipating these problems. With the advance in the development of smart textiles, it＇s possible to use these technologies in the acquisition of biosignals, which allows obtaining a better comfort regarding the use of smart clothes over traditional Ag/AgCI electrodes. In this way, it is possible to monitor for longer periods reducing the discomfort to the user. This paper reports the development of a low cost sensor with the capability of monitoring the electrical activity of the heart, measuring the heart rate and body temperature and is applied in the scenario： health ＆ wellbeing, targeting the continuous measurement of vital signs.

基于单导联ECG监护系统的嵌入式技术课程案例设计

针对嵌入式技术课程中理论抽象和设备技术深度不足的问题,文章设计出单导联ECG监护系统的案例,致力于提升学生在嵌入式领域的学习体验。课堂教学采用案例展示、教师分析、学生分组设计仿真和小组答辩等形式,以提高学生的参与度。研究结果表明,以嵌入式技术在单导联心电监护系统中的应用为背景,能够有效地激发学生的学习兴趣,加深学生对系统概念的理解,提高学生在心电信号分析设计方面的综合能力,实现理论与实践的有机结合。