Research Of The Cardiovascular Function Test Based On Biological Impedance Technology

In the world wide, cardiovascular diseases have become the primary diseases that arethreatening human health. In view of the dangers of cardiovascular diseases, theinternational medical organizations agree that the prevention of cardiovascular diseases isthe most effective way to reduce the incidence of cardiovascular disease. After a lot ofstudy on cardiovascular disease prevention, fat, especially abdominal fat content can wellpredict the risk of cardiovascular diseases. Many pathogenic factors such as dyslipidemiaand hypertension that caused by the excess of belly fat accumulation lead tocardiovascular diseases. As a result, the measurement of the abdominal fat can be used asan important indicator in the prevention of cardiovascular diseases.This paper designed the abdomen impedance measurement system and PC softwaresystem, in order to analyze the human abdomen impedance. The STM8S microcomputerminimum system used impedance conversion chip to abdominal impedance measurementby way of IIC bus, then impedance measurement results upload to computer through theUSB interface module. For the convenience of the impedance data processing and analysis,chooses LabVIEW graphical programming tools and designs the PC software impedanceanalysis system in this paper.The innovation of this paper is the use of the biological impedance technique forresearch, compare to the existing measuring methods, such as CT, MRI, the new methodis noninvasive, rich advantages such as low cost, and physiological information, throughthe use of biological impedance technique measurement of belly fat to do quantitativeanalysis in cardiovascular disease risk, thus achieve the purpose of evaluation ofcardiovascular function state. In the process of achieving research, according to themodular design concept, the using of integrated chip CH372and precision impedancetransformation AD5933, make whole system has many characteristics, such as low cost,high precision, convenient extension.At last, by investigating sample data, the analysis results show that abdominalimpedance values can be used to make quantitative judgment for the risk of cardiovascular disease. And the author promote another idea, that is by choosing suitable impedancevalues as a point of tangency and by adding waist circumference, weight and otherparameters, the detection rate of high risk of cardiovascular diseases can be improved.