超声评估小于胎龄儿的胎儿体重

Ultrasound estimation of fetal weight in small for gestational age pregnancies.

作者信息

Blumenfeld Yair J, Lee Henry C, Pullen Kristin M, Wong Amy E, Pettit Kate, Taslimi M Mark

机构信息

Department of Obstetrics and Gynecology, Stanford University, Stanford, CA 94305, USA.

出版信息

J Matern Fetal Neonatal Med. 2010 Aug;23(8):790-3. doi: 10.3109/14767050903387052.

DOI:10.3109/14767050903387052

PMID:19968588

Abstract

OBJECTIVE

Approximately half of small for gestational age (SGA) cases are due to maternal or fetal pathology, and may result in significant neonatal morbidity and mortality. The estimated fetal weight (EFW) measurement is the cornerstone of ultrasonographic findings when diagnosing and managing SGA pregnancies. Our objective was to determine the ultrasound accuracy of EFW in SGA pregnancies.

METHODS

A retrospective chart review was performed of all pregnancies complicated by SGA from a single institution (Stanford University) over a 2-year-period (2004-2006). SGA was defined as EFW < or = 10%. 98 neonates whose last ultrasound for EFW occurred within 7 days of delivery were included in the study. The absolute differences between the EFW and birthweight (BW) were analyzed, and the absolute percent errors were calculated as (EFW - BW)/BW x 100. The mean absolute differences and mean absolute percent errors were analyzed across all gestational ages (GA) and EFWs using one-way analysis of variance.

RESULTS

The mean absolute percent error for the entire cohort was 8.7% (+/-6.3%). There was no statistically significant difference in the mean absolute percent error across all GAs (<32 weeks, 32-36 weeks, >36 weeks), and EFWs (<1500 g, 1500-2000 g, >2000 g).

CONCLUSION

Ultrasound measurement of EFW in SGA pregnancies is consistent across all GAs and EFW measurements.

摘要

目的

约半数小于胎龄儿（SGA）病例是由母体或胎儿病理因素导致的，可能会造成显著的新生儿发病和死亡。估计胎儿体重（EFW）测量是诊断和管理SGA妊娠时超声检查结果的基石。我们的目的是确定SGA妊娠中EFW的超声检查准确性。

方法

对一所机构（斯坦福大学）在2年期间（2004 - 2006年）所有并发SGA的妊娠进行回顾性病历审查。SGA定义为EFW <或= 10%。98例在分娩前7天内进行过最后一次EFW超声检查的新生儿纳入研究。分析EFW与出生体重（BW）之间的绝对差值，并计算绝对百分比误差，公式为（EFW - BW）/BW×100。使用单因素方差分析对所有孕周（GA）和EFW的平均绝对差值和平均绝对百分比误差进行分析。