用生物阻抗方法和多普勒超声波测量脉冲波到达时间的比较
E Zavodna1, L Soukup, I Viščor
1Department of Physiology and Pathophysiology, Faculty of Medicine, University of Ostrava, Ostrava, Czech Republic, Institute of Scientific Instruments of the Czech Academy of Sciences, Brno, Czech Republic. vond@isibrno.cz.
Physiological research
|January 9, 2026
概括
非侵入性生物阻抗通过测量阻抗变化的最大速率,准确地估计脉冲波到达时间 (PWAT),与多普勒超声波最好相关.
科学领域:
- 生物医学工程 生物医学工程
- 心血管生理学心血管生理学
- 医学诊断 医学诊断 医学诊断
背景情况:
- 脉冲波速度 (PWV) 是评估血管健康的关键指标.
- 测量PWV的非侵入性方法在临床实践中非常受欢迎.
- 多普勒超声波是评估血液流动动态的黄金标准.
研究的目的:
- 为了比较脉冲波到达时间 (PWAT) 使用非侵入性生物阻抗与多普勒超声波的测量.
- 为了确定在多个动脉部位估计PWAT时的生物阻抗的准确性.
- 为了确定最能与多普勒衍生PWAT相关的特定生物阻抗参数.
主要方法:
- 在健康志愿者中使用生物阻抗 (-dZMAX) 和多普勒超声波进行了同时的PWAT测量.
- 多普勒超声波的时间点包括血液流动的开始 (t1),峰值 (t2) 和结束 (t3),以及中点 (t1-2).
- 在不同动脉位置评估了生物阻抗 (R-dZMAX) 和多普勒衍生时间点之间的一致性.
主要成果:
- 在R-dZMAX和多普勒衍生的t1-2 (系统流的中点) 之间发现了最低的平均误差 (2.46%).
- 当将R-dZMAX与t1,t2和t3进行比较时,观察到显著的差异.
- 该协议因评估的特定动脉部位而异.
结论:
- 生物阻抗显示了PWAT估计的潜力,特别是当R-dZMAX用于近似t1-2.
- 在动脉填充期间阻抗变化的最大速率似乎是一个更准确的PWAT指标.
- 需要进一步的研究来优化生物阻抗技术,以可靠地进行血管评估.
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