Design And Implementation Of A Rapid Screening Instrument For Congenital Heart Disease

Congenital heart disease is a common congenital malformation with an incidence of 0.8%.Early screening and diagnosis can effectively reduce the birth defect rate and infant mortality.With the implementation of the two-child policy,the increase in the number of pregnant women and the environmental problems,the incidence of congenital heart disease is increasing year by year.In order to support the census of congenital heart disease and assist doctors to achieve rapid and accurate screening of congenital heart disease,this paper designed and implemented a rapid screening instrument for congenital heart disease.According to the research background and development status of congenital heart disease,this paper combines hardware system,software system and parallel feature representation technology to form a rapid screening instrument for congenital heart disease.The hardware system is an important part.The software platform and application are built on this hardware system.The hardware system adopts modular design.It mainly has four-channel heart sound sensor,photoelectric blood oxygen sensor,Exynos4412 core board based on ARM processor,power management and other parts.Software system includes software platform and application two parts.The software platform build mainly introduces BootLoader porting,system kernel configuration,root file system construction and cross-compilation environment configuration.The application realizes signal acquisition subsystem,dynamic display subsystem,database management system,network data transmission and real-time analysis subsystem through Qt-C++ programming.For the four-channel synchronous heart sound signal,parallel feature representation based on multi-channel heart sound signal is proposed.Firstly,according to the characteristics of multi-channel signal background noise,the wavelet is used to remove noise interference.Second,the four-channel energy quotient coefficient of heart sound is extracted as serial feature.Finally,the Pearson correlation coefficient and mutual information of four-channel heart sound signal are calculated as parallel features.Multi-channel heart sound signals cover more general characteristics than single channels,making up for the shortcomings in which the amount of information carried by single-channel heart sound data is likely to be insufficient in actual recognition.The experimental results show that the multi-channel serial and parallel feature is improved by 24.95% and 30.54% compared to the single-channel feature.In summary,the screening device uses parallel auscultation to simplify the screening process on the one hand,and intelligent algorithm to improve the screening rate on the other hand,which has the characteristics of simple design,convenient use,short screening time and high diagnostic accuracy and has the value of promotion and application for families,communities and primary hospitals.