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KMID : 1144120130030020109
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Biomedical Engineering Letters
2013 Volume.3 No. 2 p.109 ~ p.114
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Portable laser Doppler flowmeter for microcirculation detection
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Hu Chang-Lin
Lin Zhan-Sheng
Chen Yen-Yu
Lin Yuan-Hsiang
Li Meng-Lin
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Abstract
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Purpose: The microcirculatory system of the human body is closely related to its physiological conditions. The laser Doppler flowmeter can detect symptoms through variations in the microcirculation; however, the present commercial Doppler flowmeter is very expensive, heavy, and inconvenient to carry. Therefore, an inexpensive, small, and portable laser Doppler flowmeter is proposed.
Methods: In this study, we designed a laser Doppler flowmeter transmitting receiving module based on the fundamental principles of laser Doppler, using a common computer for flow calculation. A self-designed correction system was used to validate the portable laser Doppler flowmeter.
Results: The coefficient of correlation between the mean frequency offset 〈ω〉 of the flowmeter and the actual mimicked blood flow rate reached a high value of R = 0.99, and the variations in microcirculation flow could be accurately measured.
Conclusions: The results proved that the low-cost portable laser Doppler flowmeter can be used extensively in early symptom detection for disease prevention and control.
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KEYWORD
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Laser Doppler, Portable flowmeter, Microcirculation, Detection
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