2018
DOI: 10.18494/sam.2018.2010
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Hematocrit-insensitive Absolute Blood Flow Rate Measurement in 0.5-mm-diameter Flow Channel Using MEMS-based Laser Doppler Velocimeter with Signal Modification for Detecting Beat Frequency from Broad Power Spectrum

Abstract: We applied our millimeter-scale laser Doppler velocimeter (µ-LDV) as an absolute blood flow rate sensor in a thin tube (0.5 mm inner diameter) for precise control of the blood flow rate. We proposed a sequence of signal processing, frequency weighting modification, and peak detection, and succeeded in the detection of the beat signal induced by flow at the center of the tube. Flow rates of 20, 40, and 60% hematocrit [volume percentage of red blood cells (RBCs) in blood] were measured. The errors with respect t… Show more

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