参考范围和Z-Score方程用于19个胎儿心脏生物特征结构,从怀孕18周到34周
Márcio Fragoso Vieira1,2, Nathalie Jeanne Bravo-Valenzuela3, Francisco Herlânio Costa Carvalho4
1Department of Obstetrics, Paulista School of Medicine - Federal University of São Paulo (EPM-UNIFESP), São Paulo, Brazil.
概括
这项研究为19个胎儿心脏结构提供了方程和参考图表,有助于准确的产前评估胎儿心脏发育. 测量结果显示了高可重现性,提高了诊断可靠性.
科学领域:
- 胎儿医学 胎儿医学
- 心脏病学 心脏病学
- 医疗成像医学成像
- 生物识别仪表是如何使用的
背景情况:
- 准确的胎儿心脏测量对于评估产前健康和发育至关重要.
- 建立规范性数据和可靠的参考范围对于识别潜在的心脏异常至关重要.
- 之前的研究可能缺乏广泛的妊娠年龄或特定心脏结构的综合数据.
研究的目的:
- 开发用于计算妊娠18至34周之间的19个胎儿心脏结构的Z分数的方程.
- 根据妊娠年龄为这些心脏结构创建百分点参考表和曲线.
- 评估胎儿心脏测量的观察者内部和观察者之间的可重复性.
主要方法:
- 一项涉及340名单子妊娠 (18-34周妊娠) 的正常胎儿的横截面研究.
- 测量了19个胎儿心脏结构,包括 annuli,心室尺寸,心脏面积/周长和大血管直径.
- 使用妊娠年龄,双双脚直径和股骨长度进行回归分析,以推导平均值和标准偏差的方程;使用类内相关系数 (ICC) 评估可重现性.
主要成果:
- 所有心脏结构的方程显示了高的确定系数 (R2),妊娠年龄是最强的预测因素.
- 对19个胎儿心脏结构生成了参考表和Z-score曲线.
- 测量显示出出色的可重复性,观察者内部的ICCs在0.938-0.993之间,观察者之间的ICCs在0.774-0.972.
结论:
- 现在可以获得19个胎儿心脏结构的验证方程和参考数据 (表和曲线).
- 这些工具有助于计算Z分数,以更好地评估胎儿心脏发育.
- 该研究证实了所有测量的心脏结构的良好至优良的可重现性.
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