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首页> 外文会议>Conference on Optical Technologies in Biophysics and Medicine IV; Oct 1-4, 2002; Saratov, Russia >Detection of inspiratory induced vasoconstrictive episodes using laser Doppler fluxmetry and photopletysmography
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Detection of inspiratory induced vasoconstrictive episodes using laser Doppler fluxmetry and photopletysmography

机译：使用激光多普勒通量法和光体积描记法检测吸入性血管收缩性发作

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摘要

Laser Doppler fluxmetry (LDF) or photopletysmography (PPG) are frequently used as non-invasive tools for the detection of the so-called "inspiratory gasp response" (IGR), a vasoconstrictive episode provoked by a voluntary deep inspiration. According to our knowledge, a rigorous comparison of both methods has not been reported in the literature. Therefore, the aim of the study was to compare the detection of IGR with LDF and PPG. We investigated 14 young and healthy volunteers. A PPG and a LDF probe were applied to adjacent fingertips of the dominant hand (thumb/index finger). After baseline measurements the subjects were asked to perform a deep inspiration with time intervals of 90 sec., 60 sec., 30 sec., and 15 sec. We found that both methods are useful to detect individual IGR. However, overall correlation of IGR amplitude detected with LDF and PPG was poor (r=0.433). Surprisingly, there was a continuous increase of the correlation coefficient from the first (r=0.105) or second (r=-0.184) IGR to the fifth (r=0.727) IGR. These results imply that experimental data obtained with PPG and LDF are not equivalent and therefore one has to be cautious regarding the comparison and interpretation of results obtained with these two different methods.
机译：激光多普勒通量术（LDF）或光电容积描记术（PPG）经常用作非侵入性工具，以检测所谓的“吸气喘息反应”（IGR），这是由自愿性深度吸气引起的血管收缩性发作。据我们所知，文献中尚未报道两种方法的严格比较。因此，本研究的目的是比较LDF和PPG对IGR的检测。我们调查了14位年轻健康的志愿者。将PPG和LDF探针应用于优势手（拇指/食指）的相邻指尖。在基线测量之后，要求受试者以90秒，60秒，30秒和15秒的时间间隔进行深度吸气。我们发现这两种方法都可用于检测单个IGR。但是，用LDF和PPG检测到的IGR振幅的整体相关性很差（r = 0.433）。出乎意料的是，相关系数从第一IGR（r = 0.105）或第二IGR（r = -0.184）到第五IGR（r = 0.727）连续增加。这些结果表明，使用PPG和LDF获得的实验数据不相等，因此，在比较和解释使用这两种不同方法获得的结果时必须谨慎。

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