| The healthcare industry today suffered a set of significant challenges on several fronts accompanied by rapid economic development and increased life expectancy, viz., availability (or access), quality, and cost. Telemedicine maybe an effective method that can respond to these challenges successfully, its appearance makes the classical"hospital centred healthcare"shift towards"hospital/community/ home/ person centred healthcare". However, telemedicine is not popularized in real life, for its client server is not well developed correspondingly and still has many problems not well settled, e.g. can not work continuously for a long time, monitor device is not light enough, the patient fells uncomfortable during measurement etc. So how to design a suitable client server is significant for telemedicine system.Heart disease is a common, recurring, chronic disease, which has become the most prevalent diseases in endangering people's health, especially for older people. ECG is an important diagnostic tool for assessing heart function, and it is valuable to monitor it dynamically and perennially for heart disease prevention, early diagnosis and cure.According to these, a design of the client server based on wearable technology for ECG telemonitor system is presented in this paper. The client server comprises of a front-end module and a back-end module. The front-end module is worn on patient's body, and it includes a ECG acquisition module, a RF transmitting chip and a power circuit. The ECG acquisition circuit is used for ECG obtaining, amplifying, filtering and A/D converting; The RF transmitting chip is applied to implement ECG wireless transmission from the front-end module to the back-end module; The power circuit provides energy for all the components of the front-end module. The back-end module has a RF receiving chip for receiving the data from the front-end module, contains a dual processor combined by a ARM and a DSP chip, and the ARM chip is used as primary commanding unit for controlling the back-end, DSP chip is employed as a co-processor exclusively for processing the ECG data from the front-end, such as digital filtering, compressing .etc and automatic pre-diagnosis. The back-end module also includes a GPRS module for tele-transmitting the data of the client to the healthcare center and receiving the feedback from the healthcare center. Meanwhile, an LCD is installed to display DSP's pre-diagnosis result, patients'information and healthcare center's feedback. Furthermore, the design fully considers the security of the data during its wireless transmission via RF and teletransmission via GPRS, an 128-bits AES encryption algorithm is applied before transmitting the data.The test result shows that the design can successfully implement non-invasive monitoring and diagnosing patient's ECG. And it also has the characters of mobility, easy-to-use, continuous monitoring, intelligent displaying diagnosis result, alarming abnormal physiological conditions, secure data transmission etc. That well improves the shortage of the traditional telemedicine system's client server. |
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