斑点对比光学光谱仪用于基于微血管血流和体积振荡的无袖血压估计
Ariane Garrett1, Byungchan Kim1, Nil Z Gurel2
1Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA.
Biomedical optics express
|August 14, 2025
概括
高速斑点对比光学光谱学 (SCOS) 与单独的光谱学相比,提高了31%的血压估计. 这种新的技术提供了强大的,非侵入性心血管监测,并有可能持续测量血压.
科学领域:
- 生物医学光学 生物医学光学
- 心血管生理学心血管生理学
- 医疗器械 医疗器械 医疗器械
背景情况:
- 非侵入性血压 (BP) 监测仍然是医疗保健中的一个重大挑战.
- 现有的方法,如光聚聚光学 (PPG) 的精度和范围都有局限性.
- 了解微血管动力学对于准确的血压评估至关重要.
研究的目的:
- 引入和验证高速斑点对比光学光谱学 (SCOS) 用于同时测量微血管血液体积和流量.
- 评估SCOS在改善非侵入性血压估计中的有效性.
- 探索SCOS在持续心血管监测方面的潜力.
主要方法:
- 开发了一种高速 (390 Hz) 的SCOS系统,用于同时测量血液体积和流量振荡.
- 从手腕和手指获取数据,使用两个波长的反射率和传输模式.
- 从高分辨率波形中提取时间,形状和频域特征.
- 将SCOS衍生功能集成到专题特定的机器学习模型中,用于BP估计.
主要成果:
- 与单独使用PPG相比,SCOS显示系统性血压估计准确度提高了31% (p < 0.0001).
- 在广泛的血压范围 (89-284 mmHg) 中,实现了显著的低血压估计误差 (静脉缩:±2.88 mmHg,腹缩:±2.14 mmHg).
- 几周后,BP的预测仍然强,这表明其可靠性很高.
结论:
- 高速SCOS显著提高了非侵入性血压估计的准确性.
- 该技术有效地表征了外围微血管的生物力学特性.
- SCOS显示了促进持续,非侵入性心血管监测,包括血压测量,的巨大潜力.
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