一个新的基于胸部的PPG测量系统
Qiuyang Lin1, Haocun Wang2, Dwaipayan Biswas1
1imec 3001 Heverlee Belgium.
IEEE journal of translational engineering in health and medicine
|November 19, 2024
概括
一个新的高动态范围 (DR) 集成电路 (IC) 系统使得精确的胸部光电图 (PPG) 监测生命体征. 这种可穿戴技术可以实现高心率准确度,并可以监测呼吸和血液氧气水平.
科学领域:
- 生物医学工程 生物医学工程
- 可穿戴技术可穿戴技术
- 集成电路设计 集成电路设计
背景情况:
- 集成电路 (IC) 的小型化使得先进的身体佩戴传感器能够进行长期健康监测.
- 可穿戴式心电图 (ECG) 和光电图 (PPG) 设备改善了患者的生活质量.
- 基于胸部的PPG提供了多生命信号提取的潜力,但需要超高动态范围 (DR) 的IC来克服信号噪声.
研究的目的:
- 为可穿戴胸部PPG应用提供专门的高DR IC系统.
- 用全面的车身测量协议验证系统的性能.
- 证明系统能够准确地提取多个生命体征的能力.
主要方法:
- 开发了一个小型的形式因素,高DR IC系统集成在20厘米2的PCB板上,用于胸部PPG.
- 在工作环境中与6名成年参与者进行了胸部PPG测量.
- 通过将胸部PPG数据与用于心率 (HR) 和心率变化 (HRV) 监测的标准心电图贴片进行比较,验证了系统准确性.
主要成果:
- 与心电图相比,达到>99.53%的HR精度,平均绝对偏差 (AD) 为每分钟0.41次.
- 在SDNN中证明HRV监测与传统PPG设备相匹配>98.6%HR匹配和<12.8 ms AD.
- 成功推导出呼吸速率和血液氧气水平 (SpO2),表现优于参考模式.
结论:
- 开发的高DR胸部PPG系统提供了准确可靠的生命体征监测.
- 这项技术推进了可穿戴健康监测,使得像慢性疾病管理的胸部贴片等新应用成为可能.
- 该系统提取多个生命体征的能力意味着可穿戴传感器能力的飞跃.
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