相关实验视频
Updated: Jul 27, 2025

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Non-invasive Assessment of Microvascular and Endothelial Function
Published on: January 29, 2013
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在冷压力测试过程中,与指动脉压力参考指纹动脉压力测试过程中,斑点斑膜学和光斑膜学之间的比较
Jorge Herranz Olazabal1,2, Ilde Lorato1, Jesse Kling1
1IMEC NL, 5656 AE Eindhoven, The Netherlands.
Sensors (Basel, Switzerland)
|June 10, 2023
概括
在低 perfusion 条件下,光斑囊镜 (SPG) 提供比光斑囊镜 (PPG) 更强大的脉冲波监测. 在冷压器测试中,SPG在信号与噪声比率 (SNR) 和波比率方面表现出更高,更稳定的信号与噪声比率.
科学领域:
- 生物光子学 生物光子学
- 医疗器械 医疗器械
- 身体生理学 身体生理学
背景情况:
- 斑点光学 (SPG) 和光光学 (PPG) 是用于血液动力学测量的生物光学技术.
- 了解低 perfusion 下的 SPG 和 PPG 之间的差异至关重要.
- 冷压器试验 (CPT) 有效调节周围循环.
研究的目的:
- 为了比较SPG和PPG在诱导低 perfusion 条件下的性能.
- 在CPT期间评估SPG和PPG的信号噪声比 (SNR) 和交替元件 (AC) 幅度.
- 分析波形差异使用SPG,PPG和手指动脉压 (fiAP) 之间的频率波比.
主要方法:
- 在639nm和850nm波长使用自定义设置同时导出SPG和PPG信号.
- 在60秒CPT之前和期间,用食指进行测量.
- 对两种技术的交流振幅和SNR的分析,使用fiAP作为参考.
- 对SPG,PPG和fiAP波形之间的频率波比进行比较.
主要成果:
- 850nm的PPG和SPG在CPT期间显示了AC和SNR的显著减少.
- 与PPG相比,SPG始终表现出更高和更稳定的SNR.
- SPG显示出比PPG更高的和比率.
结论:
- 在低 perfusion 场景中,SPG 提供比 PPG 更强大的脉冲波监测.
- SPG的优越SNR和律比率表明血液动力学评估的可靠性提高了.
- 双波长SPG在外周循环受到损害时显示出准确的生理监测的希望.
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