中晚孕正常胎儿静脉导管血流频谱特征及分析

Characteristics and analysis of blood flow spectrum of normal fetal ductus venosus in the middle and late pregnancy

目的探究静脉导管频谱随孕周的变化情况并建立不同孕周胎儿各频谱参数的正常参考值范围。方法应用彩色多普勒超声检测并成功获得983例单胎妊娠胎儿静脉导管的血流频谱,其中正常胎儿979例。测量速度参数(VS、VD、VA、TAMXV)与阻力参数(RI、PIV、PVIV)值。结果静脉导管血流频谱速度参数均与孕周呈正相关,阻力参数均与孕周呈负相关。其正常参考值范围分别为:VS(0.33,1.12)、VD(0.29,1.00)、VA(0.07,0.71)、TAMXV(0.19,0.93)、RI(0.20,0.99)、PIV(0.15,1.23)、PVIV(0.23,0.95)。结论正常胎儿静脉导管血流频谱速度参数和阻力参数与孕周具有相关性,VS、VD、VA、TAMXV与孕周呈正相关,RI、PIV、PVIV与孕周呈负相关。

Objective To explore the change of blood flow spectrum of ductus venosus with gestational week,establish normal reference ranges of spectrum parameters in different gestational weeks. Methods Blood flow spectrums of ductus venosus in 983 single fetuses were detected by color Doppler ultrasound and obtained successfully,and 979 fetuses were normal. The speed parameters（ VS,VD,VA,TAMXV） and resistance parameters（ RI,PIV,PVIV） of blood flow spectrum of ductus venosus were measured. Results The speed parameters of blood flow spectrum of ductus venosus were positively correlated with gestational week,while the resistance parameters were negatively correlated with gestational week. The normal reference ranges were VS（ 0. 33,1. 12）,VD（ 0. 29,1. 00）,VA（ 0. 07,0. 71）,TAMXV（0. 19,0. 93）,RI（0. 20,0. 99）,PIV（0. 15,1. 23）,PVIV（0. 23,0. 95）,respectively. Conclusion The speed parameters and resistance parameters of blood flow spectrum of ductus venosus in normal fetuses are correlated with gestational week. VS,VD,VA,and TAMXV are positively correlated with gestational week,while RI,PIV,and PVIV were negatively correlated with gestational week.