南方医科大学学报

南方医科大学学报 ›› 2016, Vol. 36 ›› Issue (10): 1312-.

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早孕期胎儿大脑中动脉收缩期峰值流速、心胸比值与胎儿头臀长的相关性

邓许洁，陈翠华，裘毓雯，肖淑芳，廖淑欣，钟梅，杨芳   

  • 出版日期:2016-10-20 发布日期:2016-10-20

Correlation analysis of fetal middle cerebral artery peak systolic velocity, cardiothoracic ratio and crown-rump length in early pregnancy

  • Online:2016-10-20 Published:2016-10-20

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摘要： 目的探索早孕期胎儿大脑中动脉收缩期峰值流速（MCA PSV）及心胸比值（CTR）随孕周变化的规律，建立早孕期不同孕 周胎儿MCA PSV及CTR的参考范围，并分析其与胎儿头臀长（CRL）之间的关系。方法应用彩色多普勒超声检查前瞻性检测 了552例正常产检孕妇的（45≤CRL≤84 mm）胎儿MCA PSV、CTR。按胎儿CRL大小分组，将552例孕妇分为4个孕周组，建立 早孕期胎儿MCA PSV及CTR参考范围，并分析MCA PSV与CRL、CTR与CRL之间的关系。结果早孕期胎儿MCA PSV与 CRL呈中等正相关，相关系数为0.426（P<0.001）；CTR与CRL无显著相关性，相关系数为0.168（P<0.001）。早孕期MCA PSV 的参考值范围为14.35（14.08~14.62）cm/s；CTR的参考值范围为0.34（0.33~0.34）。结论彩色多普勒超声检查用于检测早孕 期胎儿MCA PSV、CTR是可靠、可行的，具备实时监测胎儿早期发育异常的能力；早孕期不同孕周胎儿MCA PSV、CTR的参考 值范围的建立为彩色多普勒超声应用于早期无创产前诊断α-地中海贫血提供了临床理论依据。

Abstract: Objective To explore the pattern of variations in middle cerebral artery peak systolic velocity (MCA PSV) and cardiothoracic ratio (CTR) during early pregnancy, establish their reference ranges and explore their correlation with the crown-rump length (CRL). Methods A total of 522 pregnant women with normal findings in antenatal examinations underwent routine color Doppler ultrasound examination to collect the data of MCA PSV, CTR and CRL. The reference ranges of MCA PSV and CTR for different CRL levels were established, and the correlation of MCA PSV and CTR with CRL was analyzed. Results During the first trimester, MCA PSV and CRL showed a moderate positive correlation with a correlation coefficient of 0.426 (P<0.001), while CTR and CRL showed no significant correlation (0.168, P<0.001). The reference range of MCA PSV was 14.35 (14.08-14.62) cm/s and that of CTR was 0.34 (0.33-0.34) during early pregnancy. Conclusion Color Doppler ultrasound is a safe and feasible modality to assess fetal MCA PSV and CTR for detecting fetal growth abnormalities in early pregnancy. The established reference ranges of MCA PSV and CTR offer a clinical theoretical basis for detecting α-thalassemia in early pregnancy.