Research On A Long-distance ECG Monitoring System Based On Wireless Communication Network

Sudden cardiac death and heart attack are main hazards for many patients with coronary artery diseases. Professional advice and time are critical in these cases. If at emergent time patient's bio-signals could be transferred to an experienced doctor and the doctor's field medical instruction could be sent back to the patient immediately, patient's life could be saved and tragedy is avoided. Based on this consideration, we bring forward a new device, aiming at providing medical information for both patients and doctors. While monitoring the patient's bio-signals, it can transfers the bio-signals to a remote hospital monitor center or a family doctor through wireless means. The device adopts Intel StrongArm-1110 embedded CPU, including bio-signal acquisition module, data management and storage module, display control module and wireless communication module. In order to improve system's expandability and compatibility, Microsoft Inc. Windows CE 3.0 OS is installed in the device. Bio-signals, through amplification, filtering and A/D conversion, are stored in the M-PDA. Patient can use wireless communication module to transfer his bio-signals to a remote hospital monitor center and get further diagnosis and professional instruction from there. Currently we use a GPRS (General Packet Radio Service) module.We first choose Internet as the transmission channel of bio-signals data. Based on TCP/IP protocol, we use client/server model to develop our system. And the client is the device, while the server is a Windows NT server in a hospital or in social medical center. Second we choose GPRS as our wireless communication mode. As data transmission speed of GPRS is up to 115kbp/s now, it can realize the high-speed transmission. After authentication, his bio-signals data are transferred to the hospital for detailed diagnosis, and then the result and instruction will be sent back to the patient, telling him what to do next. The system on the server has a compatible database. Whenever patient connects to the server, the patient's ID, date, time, initial and final diagnosis etc. are recorded. And patient's history medical records are also provided for doctors.