超声波胎儿部半透明度测量和细胞遗传结果
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Updated: Aug 6, 2026
08:04
Murine Fetal Echocardiography
Published on: February 15, 2013
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Kara Bellai-Dussault1,2,3, Shelley D Dougan2,3, Deshayne B Fell1,3
1School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada.
JAMA network open
|March 26, 2024
概括
胎儿部半透明度低于3.5毫米的测量与染色体异常的风险增加有关,即便这些异常并非常规查. 较低的测量,特别是低于2.0毫米,表明这些条件的风险最低.
科学领域:
- 产前诊断 在产前诊断
- 遗传学 遗传学是一种遗传学.
- 产科 产科 产科 产科 产科
背景情况:
- 胎儿鼻透光度 (NT) 测量是产前查的关键组成部分,用于检测像三症21这样的染色体异常.
- 常见的3.5毫米NT值被用来触发进一步的调查,如无细胞DNA (cfDNA) 查.
- 新出现的证据表明,NT测量低于3.5毫米和染色体异常之间存在潜在的关联,尽管之前的研究存在局限性.
研究的目的:
- 调查各种胎儿部半透明度测量和细胞遗传结果之间的关联.
- 通过使用大型注册数据集,在人口层面评估这些关联.
主要方法:
- 一项以人口为基础的回顾性队列研究,利用来自加拿大安大略省围产期登记处 (2016-2021) 的数据.
- 包括从多标记查结果中识别的NT测量的单独怀孕.
- 通过产前/产后细胞遗传测试,cfDNA查和临床数据确定了染色体异常;多变量修改的Poisson回归被用于分析.
主要成果:
- 在414,268个怀孕中,NT<2.0毫米 (86.9%) 的怀孕中,染色体异常患病率最低 (0.5%).
- 从3.0到<3.5毫米的NT测量显示染色体异常的风险显著增加 (调整后风险比率[ARR],20.33).
- 即使不包括常见的动脉,NT测量值为3.0至<3.5毫米也与更高的风险有关 (ARR,4.97).
结论:
- 胎儿半透明度测量低于2.0毫米的孕妇表现出染色体异常的风险最低.
- 越来越多的NT测量,即使低于传统的3.5毫米切线,也与染色体异常的风险更高有关.
- 这些发现强调了考虑在3.5毫米以下的NT测量和选通常不包括在标准面板中的异常的重要性.
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