彩色多普勒超敏血流显像技术显示孕11～13^(+6)周胎儿心脏轴

Color Doppler high definition flow imaging in demonstrating11-13^(+6) weeks fetal cardiac axis

目的探讨彩色多普勒超敏血流(HD flow)显像技术在11~13^(+6)周胎儿心脏轴显像中的价值。方法采用灰阶超声及彩色多普勒HDflow显像技术对197胎孕11~13^(+6)周胎儿进行心脏轴显像,比较两种方法对不同孕周胎儿心脏轴的显示率;采用两种方法测量55胎孕13~13^(+5)周胎儿的心脏轴值,并进行比较。结果孕11~13^(+6)周,灰阶超声显像和HD flow显像对心脏轴的显示率分别为67.01%(132/197)、85.28%(168/197),差异有统计学意义(P<0.01);孕11~11^(+6)周,显示率分别为32.39%(23/71)、69.01%(49/71),差异有统计学意义(P<0.01);孕12~12^(+6)周,显示率分别为78.26%(54/69)、92.75%(64/69),差异有统计学意义(P<0.01);孕13~13^(+6)周,两种方法显示率均为96.49%(55/57)。灰阶超声显像和HD flow显像测量心脏轴值分别为(45.34±3.99)°、(43.62±3.33)°,差异有统计学意义(t=7.11,P<0.01)。灰阶超声测得数值离散度较大,HD flow显像测得数值相对集中。结论与灰阶超声显像相比,彩色多普勒HD flow显像可提高孕11~12^(+6)周胎儿心脏轴显示率,且可降低13~13^(+6)周胎儿心脏轴值的测量误差。

Objective To investigate the value of color Doppler high definition（HD） flow in demonstrating 11-13^＋6weeks fetal cardiac axis.Methods The cardiac axis were examined by both gray scale ultrasound and color Doppler HD flow imaging in totally 197 fetuses in 11-13^＋6 gestational weeks.The visualization rate of the two methods was compared in different gestational weeks.The value of 55 fetuses cardiac axis angles in 13-13^＋6 gestational ＂weeks were measured and compared by two methods.Results The cardiac axis visualization rates of gray scale ultrasound and color Doppler HD flow imaging in 11-13^＋6 gestational weeks were 67.01%（132/197） and 85.28%（168/197）,which had statistically difference（P〈0.01）.The visualization rates of the two methods were 32.39%（23/71） and 69.01%（49/71） in 11-11^＋6 gestational weeks,and the difference was statistically significant（P〈0.01）.The visualization rates in 12-12^＋6 gestational weeks were 78.26%（54/69） and 92.75%（64/69）,which was statistically significant（P〈0.01）.The visualization rates of two methods in 13-13^＋6 gestational weeks were both 96.49%（55/57）.Cardiac axis angles measured by gray scale ultrasound and color Doppler HD flow imaging were（45.34±3.99）° and（43.62 ± 3.33）° respectively,and the difference was statistically significant（t=7.11,P〈0.01）.The result of gray scale ultrasound showed slightly higher standard deviation value and discrete degree than that of color Doppler HD flow imaging.Conclusion Compared with the gray scale ultrasound,color Doppler HD flow imaging can improve the visualization rate of cardiac axis and reduce the measurement errors in 11-13^＋6 gestational weeks fetal.