摘要
目的：利用彩色多普勒超声观察妊娠中晚期胎儿肝静脉及下腔静脉的血流频谱，从而确定其血流指数与孕周关系及其参考范围。方法：利用脉冲多普勒超声获得118例孕龄26~40周单胎妊娠胎儿肝左静脉、肝中静脉、肝右静脉及下腔静脉的血流频谱，测量并记录血流指数（A/S），并进行统计学分析。结果：3支肝静脉和下腔静脉血流频谱类似，均为三相频谱，随孕周增加A/S逐渐减小。4支静脉回归方程无明显差异。结论：胎儿肝静脉和下腔静脉多普勒血流指数非常相近，均可独立作为估测胎儿右心功能的指标。
Abstract
Objective: To study the Doppler flow spectrum of fetal hepatic vein and inferior vena cava and determine the gestational age-related reference range of their preload index. Methods: Doppler measurements were obtained for the 4 veins of 118 normal fetuses at the 26~40 week of gestation. A and S values were measured from the recorded flow velocity waveform of each vein and the A/S ratio was calculated and analyzed as the preload index. Results: There was a three-phase blood flow spectrum which could be observed in the hepatic vein and the inferior vena cava. The A/S ratios decreased gradually with the increase of the gestational age, which were less than 0.5. There was no significant difference between the four regression equations. Conclusions: The flow indexes of fetal hepatic vein and inferior vena cava are statistically similar, which may be utilized as an index for the estimation of fetal cardiac function.
关键词
肝静脉 /
胎儿 /
心室功能 /
右 /
超声检查 /
产前
Key words
Hepatic veins /
Fetus /
Atrial function /
right /
Ultrasonography /
prenatal
樊慧丽.
胎儿肝静脉及下腔静脉血流的多普勒超声频谱研究[J]. 中国临床医学影像杂志. 2015, 26(4): 275-277
FAN Hui-li.
Duplex Doppler ultrasonography on the blood flow of fetal hepatic vein and inferior vena cava[J]. Journal of China Clinic Medical Imaging. 2015, 26(4): 275-277
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