| 摘要: |
| 目的 探讨超声经后脑横断面观察11~13+6孕周胎儿颅内后脑结构的可行性，以期在开展对早中孕胎儿颅内结构进行有效筛查的同时缩短检查时间。方法 随机选择2695例11~13+6孕周正常胎儿进行颅脑正中矢状面及经后脑横断面切面的获取，观察后脑结构并分别测量颅内透明层的厚度进行统计比较两者一致性。结果 2695例胎儿中，2402例获得颅脑正中矢状切面及经后脑横断面，另有239例仅获得经后脑横断面，未获得颅脑正中矢状切面。颅脑正中矢状切面及经后脑横断面均可观察到胎儿后脑“二高三低回声带”结构，2402例胎儿两种切面所测IT值使用MedCalc医学统计软件进行Bland-Altman绘图分析。两种切面所测IT值具有较高的一致性。结论 经后脑横断面与颅脑正中矢状切面同样可以有效观察胎儿后脑结构，但经后脑横断面的获取较少受到胎儿体位限制，该切面的运用可提高超声医师的工作效率，同时对于体位不佳的胎儿，经后颅窝横断面为观察其颅脑结构提供一个有效的途径。 |
| 关键词: 产前 超声 早孕期 颅内透明层 |
| DOI： |
| 投稿时间：2019-05-15修订日期：2019-06-10 |
| 基金项目:重庆市卫生计生委2015年医学科研计划项目 |
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| Application of Intracranial Posterior Brain Structure of Fetus at 11-13+6 Weeks of Pregnancy by Transverse of Posterior Brain with Ultrasound |
| ZHANG Xue-mei,ZHANG Xiao-hang |
| (Chongqing Maternal and Child Health Hospital) |
| Abstract: |
| Objective To explore the feasibility of using transverse ultrasound to observe the intracranial posterior brain structure of fetuses in 11-13+6 gestational weeks, so as to shorten the examination time while effectively screening the intracranial structure of fetuses in early and middle pregnancy. Methods 2695 normal fetuses of 11-13+6 gestational weeks were randomly selected to obtain the mid-sagittal and transverse sections of the brain. The structure of the posterior brain was observed and the thickness of the intracranial transparent layer was measured. Results Of the 2695 fetuses, 2402 received mid-sagittal and posterior transverse sections of the brain, and 239 received only posterior transverse sections of the brain, but no mid-sagittal sections of the brain were obtained. The structure of "two high and three low echo cords" in fetal posterior brain was observed on sagittal section and transverse section. The IT values measured on two sections of 2402 fetuses were analyzed by Bland-Altman software. The IT values measured in the two sections are in good agreement. Conclusion Posterior transverse section and sagittal section of the brain can effectively observe fetal posterior brain structure, but fetal posture restricts the acquisition of posterior transverse section. The use of this section can improve the work efficiency of ultrasound doctors. At the same time, for fetuses with poor posture, transverse section of the posterior cranial fossa provides an effective way to observe fetal brain structure. |
| Key words: :Prenatal ultrasonography First trimester Intracranial translucency |
