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首页> 外文会议>Annual International Conference of the IEEE Engineering in Medicine and Biology Society >Evaluation of optoelectronic Plethysmography accuracy and precision in recording displacements during quiet breathing simulation
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Evaluation of optoelectronic Plethysmography accuracy and precision in recording displacements during quiet breathing simulation

机译：在安静呼吸模拟过程中评估光电脉搏描记术的准确性和记录位移的精度

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摘要

Opto-electronic Plethysmography (OEP) is a motion analysis system used to measure chest wall kinematics and to indirectly evaluate respiratory volumes during breathing. Its working principle is based on the computation of marker displacements placed on the chest wall. This work aims at evaluating the accuracy and precision of OEP in measuring displacement in the range of human chest wall displacement during quiet breathing. OEP performances were investigated by the use of a fully programmable chest wall simulator (CWS). CWS was programmed to move 10 times its eight shafts in the range of physiological displacement (i.e., between 1 mm and 8 mm) at three different frequencies (i.e., 0.17 Hz, 0.25 Hz, 0.33 Hz). Experiments were performed with the aim to: (i) evaluate OEP accuracy and precision error in recording displacement in the overall calibrated volume and in three sub-volumes, (ii) evaluate the OEP volume measurement accuracy due to the measurement accuracy of linear displacements. OEP showed an accuracy better than 0.08 mm in all trials, considering the whole 2m calibrated volume. The mean measurement discrepancy was 0.017 mm. The precision error, expressed as the ratio between measurement uncertainty and the recorded displacement by OEP, was always lower than 0.55%. Volume overestimation due to OEP linear measurement accuracy was always <; 12 mL (<; 3.2% of total volume), considering all settings.
机译：光电脉搏描记术（OEP）是一种运动分析系统，用于测量胸壁运动学并间接评估呼吸过程中的呼吸量。它的工作原理是基于计算放置在胸壁上的标记位移。这项工作旨在评估OEP在安静呼吸过程中测量人胸壁位移范围内位移的准确性和精度。通过使用完全可编程的胸壁模拟器（CWS）对OEP性能进行了研究。 CWS被编程为以三种不同的频率（即0.17 Hz，0.25 Hz，0.33 Hz）在生理位移范围内（即1 mm至8 mm之间）移动其八根轴10倍。进行实验的目的是：（i）在记录的总校准体积和三个子体积中评估位移时的OEP精度和精度误差，（ii）由于线性位移的测量精度而评估OEP体积测量精度。考虑到整个2m校准体积，OEP在所有试验中均显示优于0.08 mm的精度。平均测量差异为0.017 mm。精度误差表示为测量不确定度与OEP记录的位移之间的比率，始终低于0.55％。由于OEP线性测量精度而导致的体积高估始终<;考虑所有设置，为12 mL（<;占总体积的3.2％）。

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