The External Counterpulsation Control System Based On Arm

ECG signal of the human body contains a wealth of information to reflect the heart of the physiological state, has a close relationship with the person’s health status, access to the vast majority of the characteristic parameters of ECG signal by detecting the pulse signal. Therefore, the pulse signal in-depth analysis and research has a unique significance. External counterpulsation(External Counterpulsation) system is a microcontroller to control the mechanical circulatory support system, capable to increase various organs of the body of blood supply, reducing the load on the heart and oxygen consumption, the promotion of ischemic tissues and organs side branch circulation and other aspects have a significant effect. The principle is the ECG signal detection, after data processing, wrapped in a patient’s limbs and buttocks enclosed airbag carried sequential compression. The entire process can improve the heart of the diastolic blood pressure and coronary perfusion, reduce cardiac load and myocardial oxygen consumption.In this thesis, the analysis of the medical principle of enhanced external counterpulsation and currently on the market external counterpulsation device to do a detailed research, a new external counterpulsation control system design. Of the control system can be determined by the test finger refers to pulse charge and exhaust timing of external counterpulsation device has a simple, efficient and reliable. At the same time, the program also used to look for the optimal control algorithm to ECG parameters in real time to adjust and improve the effect of counterpulsation controll.In vitro anti-stroke device control must be consistent with the characteristics of the human blood circulation, the key is to precisely control the balloon each charge, exhaust timing. This requires to design a system to accurately calculate the QT interval through the QRS complex, parameter fine-tuning to determine the charge of the timing of the exhaust. In order to ensure accurate measurement of the detection signal processing, using high-speed ARM processor and high accuracy A/D converter, and also wavelet transform theory to the pulse signal noise reduction processing. Through the use of technologies such as USB, TCP/IP high-speed data acquisition and communications, telemedicine and other functions, and further expansion of the external counterpulsation device and treatment.