使用声音复杂度参数,对胎儿正常的静脉管道循环系统进行表征
A S R Souza1,2,3, C F Carvalho1,2, G F A Souza2
1Centro de Atenção à Mulher, Instituto de Medicina Integral Prof. Fernando Figueira, Recife, PE, Brasil.
概括
对胎儿静脉管道信号的非线性分析显示,在整个妊娠三季度中,复杂度没有显著变化. 这表明静脉管的缩时间对妊娠期间胎儿心血管动态的差异化不敏感.
科学领域:
- 心血管生理学心血管生理学
- 胎儿医学 胎儿医学
- 非线性动力学是一种非线性动力学.
背景情况:
- 评估胎儿循环系统的正常性对于产前护理至关重要.
- 非线性方法为复杂的生物信号提供了新的见解.
- 静脉管道在胎儿的血液循环中起着关键作用.
研究的目的:
- 通过对管道静脉信号的非线性分析来描述胎儿循环系统的正常性.
- 为了评估健康胎儿的三个妊娠季度内静脉管系统时间复杂性的变化.
主要方法:
- 包括健康孕妇 (怀孕11-14周) 在内的前性队列研究.
- 在每个三个月内进行的静脉管道多普勒速度计超声波.
- 从多普勒记录中提取和细分声信号.
- 使用近似 (ApEn) 和Lempel-Ziv复杂性 (CLZ) 分析信号复杂性.
主要成果:
- 在第一,第二和第三季度之间的平均ApEn (P=0.281) 或CLZ (P=0.595) 中没有发现统计学上显著的差异.
- 静脉管的缩时间复杂性在整个妊娠期间没有显著变化.
- 使用的非线性参数不敏感,无法在三个月之间区分胎儿心血管动态.
结论:
- 用非线性方法分析的胎儿静脉管系统时间,在健康胎儿的三个妊娠季度中表现出一致的复杂性.
- 这项研究提供了使用静脉管的非线性参数对胎儿心血管正常性的基本特征.
- 静脉管的缩时间复杂性可能不是评估妊娠期间胎儿心血管适应的可靠指标.
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