NDLI: Detection of Site-Specific Blood Flow Variation in Humans during Running by a Wearable Laser Doppler Flowmeter

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Detection of Site-Specific Blood Flow Variation in Humans during Running by a Wearable Laser Doppler Flowmeter

Content Provider	MDPI
Author	Iwasaki, Wataru Nogami, Hirofumi Takeuchi, Satoshi Furue, Masutaka Higurashi, Eiji Sawada, Renshi
Abstract	Wearable wireless physiological sensors are helpful for monitoring and maintaining human health. Blood flow contains abundant physiological information but it is hard to measure blood flow during exercise using conventional blood flowmeters because of their size, weight, and use of optic fibers. To resolve these disadvantages, we previously developed a micro integrated laser Doppler blood flowmeter using microelectromechanical systems technology. This micro blood flowmeter is wearable and capable of stable measurement signals even during movement. Therefore, we attempted to measure skin blood flow at the forehead, fingertip, and earlobe of seven young men while running as a pilot experiment to extend the utility of the micro blood flowmeter. We measured blood flow in each subject at velocities of 6, 8, and 10 km/h. We succeeded in obtaining stable measurements of blood flow, with few motion artifacts, using the micro blood flowmeter, and the pulse wave signal and motion artifacts were clearly separated by conducting frequency analysis. Furthermore, the results showed that the extent of the changes in blood flow depended on the intensity of exercise as well as previous work with an ergometer. Thus, we demonstrated the capability of this wearable blood flow sensor for measurement during exercise.
File Size	2805760
Ending Page	25519
Page Count	13
Starting Page	25507
File Format	PDF
e-ISSN	14248220
DOI	10.3390/s151025507
Journal	Sensors
Issue Number	10
Volume Number	15
Language	English
Publisher Date	2015-10-05
Access Restriction	Open
Subject Keyword	wearable sensor blood flow exercise laser Doppler MEMS
Content Type	Text
Resource Type	Article

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