Electrical Engineering Department, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands.
Catharina Ziekenhuis, 5623 EJ Eindhoven, The Netherlands.
Sensors (Basel). 2024 Oct 1;24(19):6374. doi: 10.3390/s24196374.
: Contactless monitoring of instantaneous heart rate and respiration rate has a significant clinical relevance. This work aims to use Speckle Vibrometry (i.e., based on the secondary laser speckle effect) to contactlessly measure these two vital signs in an intensive care unit. : In this work, we propose an algorithm for the estimation of instantaneous heart rate and respiration rate from mechanically ventilated patients. The algorithm uses multiple regions, principal component analysis, and dominant angle analysis. A semi-automated peak detection method is implemented to precisely label the aortic valve opening peak within the cardiac waveform. : Compared with electrocardiography, the present work achieves limits of agreement of [-2.19, 1.73] beats per minute of instantaneous heart rate. The measurement spot is on the chest covered with two to three layers of duvet blankets. Compared with the airway flow signal measured by the mechanical ventilator, the present work achieves limits of agreement of [-0.68, 0.46] respirations per minute of instantaneous respiration rate. : These results showcased Speckle Vibrometry's potential in vital sign monitoring in a clinical setting. : This is the first human clinical study for Speckle Vibrometry.
: 无接触式监测瞬时心率和呼吸率具有重要的临床意义。本工作旨在利用散斑振动测量技术（即基于二次激光散斑效应）在重症监护病房中无接触式测量这两项生命体征。 : 在这项工作中，我们提出了一种用于从机械通气患者中估计瞬时心率和呼吸率的算法。该算法使用多个区域、主成分分析和主导角度分析。实现了一种半自动的峰值检测方法，以精确标记心脏波形中的主动脉瓣开口峰值。 : 与心电图相比，本工作的瞬时心率的协议界限为[-2.19, 1.73] 次/分钟。测量点位于胸部，上面覆盖着两到三层羽绒被。与机械呼吸机测量的气道流量信号相比，本工作的瞬时呼吸率的协议界限为[-0.68, 0.46] 次/分钟。 : 这些结果展示了散斑振动测量技术在临床环境中进行生命体征监测的潜力。 : 这是散斑振动测量技术的首例人体临床研究。
