双双面体直径与皇冠长作为第一季度晚期怀孕的标准参数
H K Gjessing1,2, P Grøttum3, J M Dreier4
1Centre for Fertility and Health, Norwegian Institute of Public Health, Oslo, Norway.
概括
双双体直径 (BPD) 和冠长度 (CRL) 提供了类似的准确度,用于第一季度妊娠年龄的约会. 由于在整个怀孕期间的测量方便和快速,BPD在临床上具有优势.
科学领域:
- 孕产妇和胎儿医学 孕产妇和胎儿医学
- 产前诊断 在产前诊断
- 胎儿生物识别 胎儿生物识别
背景情况:
- 准确的妊娠年龄 (GA) 约会对于最佳的怀孕管理至关重要.
- 第一个三个月的胎儿测量是早期GA确定的关键.
- 精确比较双对面直径 (BPD) 和冠长度 (CRL) 是必不可少的.
研究的目的:
- 为了比较BPD和CRL在预测第一季度末和第二季度初的GA中的精度.
- 通过基于人口的方法来评估这些测量.
主要方法:
- 使用11,041个怀孕和12,260个CRL/BPD测量,构建GA预测曲线.
- 应用局部线性定量回归和时间到事件分析.
- 对个体预测差异的评估和对出生类型的敏感性分析.
主要成果:
- BPD和CRL在术语预测中表现出几乎相同的精度.
- 超过51%的检查显示GA预测差异为1天或更少.
- 忽视诱导分娩引入了大约2天的系统偏差.
结论:
- 根据人口数据,BPD与CRL一样准确,用于基于人口数据的第一季度GA日期.
- BPD提供临床好处:更容易,更快地测量,并在整个怀孕期间适用.
- BPD是早期胎儿生物识别中CRL的一个可行的替代方案.
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