探索LED到光探测器间距对皮下光电显微镜持续血压测量的效果
bioRxiv : the preprint server for biology
|September 26, 2025
概括
一个新的灵活的光聚体显微镜 (PPG) 传感器旨在改善深层肌肉组织中血液体积的检测. 虽然初步测试显示有希望的趋势,但需要进一步的研究来证实其对持续心血管监测的有效性.
科学领域:
- 生物医学工程 生物医学工程
- 光学传感传感器是什么?
- 心血管监测 心血管监测
背景情况:
- 摄影电流图 (PPG) 对于测量心率,血液氧气和血压至关重要.
- 植入的PPG系统提供持续的心血管健康监测,但由于毛细血管有限,肌肉组织面临挑战.
- 现有的方法难以准确地检测肌肉组织深处的体积血液.
研究的目的:
- 开发一个灵活的PPG传感器,以改善大肌肉体积血液检测,独立于皮肤毛细血管密度.
- 调查传感器在可变深度检测血液体积变化的能力,可能超过皮肤设备的能力.
- 为了验证传感器的性能,使用体外幻象和初步体内动物研究.
主要方法:
- 设计了一种灵活的PPG传感器,配备多个红外 (IR) 发光二极管 (LED) 和一个单一的IR光电探测器.
- 在体外测试中使用了IR板架幻影,模拟红外吸收,模仿组织中的血管.
- 进行了初步的体内验证,使用成年模型进行了验证.
主要成果:
- 对于更深的船只,观察到信号噪声比 (SNR) 增加的趋势,LED到探测器间距最远,与预测保持一致.
- 统计分析 (ANOVA,后期测试) 表明这些趋势没有达到统计学意义.
- 在体内测试显示了与PPG测量现有文献一致的结果.
结论:
- 开发的灵活的PPG传感器显示了深层肌肉血液体积检测的潜力,在更深的深度上有改善SNR的趋势.
- 需要进一步的研究来完善幻影模型以获得更好的生物表征,并确认减少的SNR变化.
- 这项技术的验证可以促进心血管健康的持续监测,特别是对于脊髓损伤患者的高血压和自主反射障碍等疾病.
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