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Development of Miniaturized Fiber-Optic Laser Doppler Velocimetry Sensor for Measuring Local Blood Velocity : Measurement of Whole Blood Velocity in Model Blood Vessel Using a Fiber-Optic Sensor with a Convex Lens-Like Tip
Joint Authors
Kohri, Shimpei
Ohba, Kenkichi
Ishihara, Wataru
Tajikawa, Tsutomu
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-06-14
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
A miniaturized fiber-optic laser Doppler velocimetry sensor has been developed to measure the local blood velocity in vivo.
The laser beam emitted from the sensor tip can be focused at any distance between 0.1 and 0.5 mm from the tip.
Consequently, the sensor has a sufficiently high signal-to-noise ratio to measure the local velocity in almost any opaque fluid, including blood.
The sensor head is inserted in an injection needle or a catheter tube.
In the former case, it is inserted at an angle to the wall of a vessel and is scanned across the vessel to measure the velocity distribution.
In the latter case, it is aligned parallel with the flow in a vessel.
For all flows of whole human blood, whole caprine blood, and 69% hematocrit of bovine blood, the velocity distribution across the vessel could be measured very accurately.
The insertion angle of the fiber into the flow significantly affects the measurement accuracy; an angle of about 50° is suitable when an injection needle is used.
When a catheter is employed, an insertion direction opposite to the flow direction is better than parallel to the flow due to the generation of a wake behind the fiber.
American Psychological Association (APA)
Tajikawa, Tsutomu& Ishihara, Wataru& Kohri, Shimpei& Ohba, Kenkichi. 2012. Development of Miniaturized Fiber-Optic Laser Doppler Velocimetry Sensor for Measuring Local Blood Velocity : Measurement of Whole Blood Velocity in Model Blood Vessel Using a Fiber-Optic Sensor with a Convex Lens-Like Tip. Journal of Sensors،Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-471288
Modern Language Association (MLA)
Tajikawa, Tsutomu…[et al.]. Development of Miniaturized Fiber-Optic Laser Doppler Velocimetry Sensor for Measuring Local Blood Velocity : Measurement of Whole Blood Velocity in Model Blood Vessel Using a Fiber-Optic Sensor with a Convex Lens-Like Tip. Journal of Sensors No. 2012 (2012), pp.1-11.
https://search.emarefa.net/detail/BIM-471288
American Medical Association (AMA)
Tajikawa, Tsutomu& Ishihara, Wataru& Kohri, Shimpei& Ohba, Kenkichi. Development of Miniaturized Fiber-Optic Laser Doppler Velocimetry Sensor for Measuring Local Blood Velocity : Measurement of Whole Blood Velocity in Model Blood Vessel Using a Fiber-Optic Sensor with a Convex Lens-Like Tip. Journal of Sensors. 2012. Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-471288
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-471288