A non invasive and intelligent method for cardiovascular parameters tele-monitoring

摘要

The innovation of our method is to design a new techniques with multiple capabilities, autonomy and automatic applications in the tele-monitoring and diagnosis of some cardiovascular parameters relative to a certain categories of patients (elderly, children, pregnant women) with cardiovascular diseases. Theoretical model of transthoracic impedance is performed in order to determine aortic pressure with a non-invasive method: the bioimpedance method. The start idea is that aortic impedance variation depends on aortic section, which depends on systolic and diastolic pressure, during cardiac cycle. Theoretical relationships, between electrical bioimpedanc signal and aortic and ventricular pressures are therefore established. The second parameters are the cardiac output Q. The third parameters determined is the arterial compliance C. Results reflect those reached in bibliography, that Cp is significantly reduced in hypertensive patients (Cp=0.48 ± 0.09 E-10 m5.N; normal value of Cp is 1.76 ± 0.28 E-10 m5.N). All this parameters are monitored using telemedicine techniques.