脐动脉血流信号非线性临床研究

Nonlinear Clinical Study of Umbilical Artery Blood Flow Signal

针对孕妇脐动脉血流信号确定性与随机性相结合的复杂非线性特征,从一个新的角度研究正常与病态血流信号间的差异。首先以孕妇真实的临床诊断数据为研究对象,分析了超声脐动脉血流信号的搏动指数、阻力指数及S/D值,并分析了其健康状况,在此基础上引入分形维数对非线性脐动脉血流信号进行对比研究。通过分析孕妇脐动脉血流分形维数,分析异常脐血流信号的分形特征,结果表明:分形维数与孕周具有相关性,分形维可作为定量检测孕妇及胎儿健康状况的重要指标。

Aiming at the complex nonlinear characteristics of determinate and randomness of umbilical arterial blood flow signals in pregnant women, the difference between normal and abnormal blood flow signals is studied from a new perspective. Firstly, the actual clinical diagnosis data of pregnant women were taken as the research object. The pulsation index (PI), resistance index (RI) and S/D value of ultrasound umbilical artery blood flow signal were analyzed, and their health status was analyzed. A comparative study of nonlinear umbilical arterial blood flow signals was performed by using fractal dimension. The fractal dimension of umbilical arterial blood flow and the fractal characteristics of abnormal umbilical blood flow signal were analyzed.The results showed that fractal dimension is correlated with gestational age and it can be used as an important indicator for quantitative detection of pregnant women and fetus health status.