E-flow显像在胎儿肺静脉超声检查中的应用

目的 探讨E-flow显像技术在胎儿肺静脉超声检查中的价值。方法 以肺做透声窗，对332例不同孕周胎儿肺静脉进行检查，运用二维超声心动图(2DE)、彩色多普勒血流显像(CDFI)及E-flow显示技术检查肺静脉，对三种方法进行比较。结果 肺静脉显示情况为：孕12～22周胎儿共118例,2DE显示7例,CDFI显示49例,E-flow显示73例，E-flow显示率明显高于前两者(P＜0.001);23～40周胎儿214例，2DE显示41例，CDFI显示171例,E-flow显示177例，E-flow及CDFI显示率明显高于2DE(P＜0.001)，E-flow与CDFI显示率无明显差异(P＞0.0167)。结论E-flow对肺静脉血流较敏感，在中孕早期对肺静脉的显示明显优于2DE及CDFI。

Application of E-flow in ultrasound examination of fetal pulmonary vein

Objective To explore the value of E-flow technique in ultrasound examination of fetal pulmonary vein.Methods The pulmonary veins of 332 fetus were examined using lungs as acoustic window by two-dimensional echocardiography(2DE), color Doppler flow imaging (CDFI) and E-flow.Visualization ratios of the three methods were compared.Results The fetal pulmonary veins were displayed as following:7 cases were showed by 2DE,49 cases by CDFI and 73 cases by E-flow among 118 cases during 12 - 22 gestational weeks.The visualization ratio of E-flow was higher than that of the other two methods (P ＜0.001).Fourty-one cases were showed by 2DE, 171 cases by CDFI and 177 cases by E-flow among 214 cases during 23 - 40 gestational weeks.The visualization ratios of E-flow and CDFI were higher than that of 2DE (P ＜ 0.001).The visualization ratio of E-flow and CDFI has no distinct differrence (P ＞ 0.0167).Conclusions E-flow was sensitive to pulmonary vein blood flow and better than 2DE and CDFI in early stage of the second trimester.