| 宋桃桃,解丽梅.胎儿期主动脉峡部血流动力学研究进展[J].中国医学影像技术,2018,34(1):152~155 |
| 胎儿期主动脉峡部血流动力学研究进展 |
| Research progresses of hemodynamics in aortic isthmus during fetal period |
| 投稿时间：2017-04-17 修订日期：2017-10-21 |
| DOI：10.13929/j.1003-3289.201704080 |
| 中文关键词: 主动脉峡部 血流动力学 超声检查,多普勒 胎儿 |
| 英文关键词:Aortic isthmus Hemodynamics Ultrasonography,Doppler Fetus |
| 基金项目:2015年辽宁省自然科学基金（2015020538）。 |
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| 中文摘要: |
| 胎儿期主动脉峡部连接左右两个平行的心血管系统，其主要作用是调节膈上与膈下血液循环，在胎盘功能障碍胎儿乏氧时增加大脑和心脏血液灌注量，以保证胎儿重要脏器的营养供应。主动脉峡部血流波形可在胎儿主动脉弓长轴切面或三血管气管切面获得，并具有典型特征：妊娠中晚期出现收缩末期切迹并随孕龄增加逐渐加深。主动脉峡部多普勒血流波形与胎儿大脑、心脏功能密切相关，其舒张期出现反向信号提示胎儿宫内情况不良。 |
| 英文摘要: |
| In the fetal circulation, the right and left cardiovascular system are positioned in parallel, and the aortic isthmus behaves as a shunt that connecting both up-and downstream circulations, allowing the fetuses to increase or reduce the amount of blood directed to the brain and heart depending on the degree of oxygen supply from the placenta. Doppler blood flow waveform of the fetal aortic isthmus can be obtained from the traditional longitudinal aortic arch view or the more recently described three vessels and trachea view of the fetal upper mediastinum. The aortic isthmus blood flow has a characteristic shape with end-systolic notch during the third trimester pregnancy and gradually deepen with the increase of gestational age. Doppler blood flow waveform of the aortic isthmus is closely related to fetal brain and heart function, and its reverse signal in the diastolic phase shows the poor intrauterine fetus. |
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