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A Wearable Fiberless Optical Sensor for Continuous Monitoring of Cerebral Blood Flow in Mice

Continuous and longitudinal monitoring of cerebral blood flow (CBF) in animal models provides information for studying the mechanisms and interventions of various cerebral diseases. Since anesthesia may affect brain hemodynamics, researchers have been seeking wearable devices for use in conscious an...

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Bibliographic Details
Published in:IEEE journal of selected topics in quantum electronics 2019-01, Vol.25 (1), p.1-8
Main Authors: Huang, Chong, Gu, Yutong, Chen, Jing, Bahrani, Ahmed A., Abu Jawdeh, Elie G., Bada, Henrietta S., Saatman, Kathryn, Yu, Guoqiang, Chen, Lei
Format: Article
Language:English
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Summary:Continuous and longitudinal monitoring of cerebral blood flow (CBF) in animal models provides information for studying the mechanisms and interventions of various cerebral diseases. Since anesthesia may affect brain hemodynamics, researchers have been seeking wearable devices for use in conscious animals. We present a wearable diffuse speckle contrast flowmeter (DSCF) probe for monitoring CBF variations in mice. The DSCF probe consists of a small low-power near-infrared laser diode as a point source and an ultrasmall low-power CMOS camera as a two-dimensional detector array, which can be affixed on a mouse head. The movement of red blood cells in brain cortex (i.e., CBF) produces spatial fluctuations of laser speckles, which are captured by the camera. The DSCF system was calibrated using tissue phantoms and validated in a human forearm and mouse brains for continuous monitoring of blood flow increases and decreases against the established technologies. Significant correlations were observed among these measurements (R 2 ≥ 0.80, p
ISSN:1077-260X
1558-4542
DOI:10.1109/JSTQE.2018.2854597