The most commonly used oscillometric upper-arm (UA) blood pressure (BP) monitors are not convenient enough for ambulatory BP monitoring, given the large size of the arm cuff and the compression of UA during the measurement. Finger-worn oscillometric BP devices featuring miniaturized finger cuff have been developed and researched as an alternative solution to the UA-based measurement, yet the reliability of the finger-based measurement is still questioned. To investigate the feasibility of oscillometric BP measurements at the finger position, we performed model-based analysis and experimental validation to explore the underlying issues associated with extending the cuff-based oscillometric approach from UA to other alternative sites. The simulation results revealed that a larger bone-to-tissue volume ratio produced a lower pressure transmission efficiency, which can account for the inter-site measurement discrepancies of mean blood pressure (MBP). We also experimentally compared the oscillometric MBP measurements at UA, middle forearm, wrist, finger proximal phalanx, and finger distal phalanx (FD) of 20 young adults, and each position was matched with a cuff of appropriate size and kept at the same height with the heart. The experimental results demonstrated that FD could be a superior alternative position for oscillometric BP measurement, as it requires the smallest cuff size while providing the most consistent MBP with the UA. Our analysis also suggested that further study is demanded to identify the appropriate oscillometric algorithm for reliable systolic blood pressure and diastolic blood pressure measurements at FD.

中文翻译：

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指尖示波血压测量的可行性：基于模型的分析和实验验证

由于臂袖尺寸较大且测量过程中UA受压，最常用的示波上臂（UA）血压计（BP）监测仪不足以用于动态BP监测。作为基于UA的测量的替代解决方案，已经开发并研究了具有微型指套的手指佩戴式示波BP设备，但是基于手指的测量的可靠性仍然受到质疑。为了研究在手指位置进行示波血压测量的可行性，我们进行了基于模型的分析和实验验证，以探讨与将基于袖带的示波法从UA扩展到其他替代部位有关的潜在问题。仿真结果表明，较大的骨组织体积比产生较低的压力传输效率，这可以解释平均血压（MBP）的站点间测量差异。我们还通过实验比较了20名年轻成年人在UA，前臂中部，腕部，手指近端指骨和手指远端指骨（FD）处的示波MBP测量值，每个位置均配有合适尺寸的袖带，并保持在相同的高度。心。实验结果表明，FD可以作为示波血压测量的最佳替代位置，因为它需要最小的袖带尺寸，同时与UA提供最一致的MBP。