Carotid Doppler
Carotid Doppler - Related Videos
09:12
Sound Waves and Doppler Shift
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2023
Source: Arianna Brown, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA Waves are disturbances that propagate through a material medium or empty space. Light waves can travel through a vacuum and some forms of matter, and are transverse in nature, which means that the oscillations are perpendicular to the direction of propagation. However, sound waves are pressure waves that travel through an elastic medium like air,...
11:00
A Model of Disturbed Flow-Induced Atherosclerosis in Mouse Carotid Artery by Partial Ligation and a Simple Method of RNA Isolation from Carotid Endothelium
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Cited by 83 •
2010
This describes a partial carotid ligation surgery, which causes disturbed flow conditions and subsequent atherosclerosis development (in two weeks) with intraplaque neo-vascularization (in four weeks) in the mouse common carotid artery. We also describe a novel method of RNA isolation from the carotid intima, providing high purity endothelial RNA.
00:56
Doppler Effect - I
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2023
The Doppler effect and Doppler shift were named after the Austrian physicist and mathematician Christian Johann Doppler in 1842, who conducted experiments with both moving sources and moving observers. Consider an observer standing on a street corner, observing an ambulance with a siren sound passing by at a constant speed. The observer experiences two characteristic changes in the sound of the siren. Initially, the sound increases in loudness as the ambulance approaches and decreases in...
01:05
Doppler Effect - II
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2023
The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...
07:26
Ferric Chloride-induced Thrombosis Mouse Model on Carotid Artery and Mesentery Vessel
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Cited by 49 •
2015
The FeCl3 induced thrombosis model in mice is described herein. A method to monitor thrombus growth by intravital microscopy observation on a mesenteric vessel and by blood flow measurement in the carotid artery is presented.
FAQs
The system detects frequency shifts produced by moving red blood cells and uses them to estimate flow velocity and direction. These measurements also help identify turbulence, or disturbed flow. Because the signal is interpreted together with two-dimensional vessel imaging, clinicians can relate abnormal flow patterns to structural findings such as plaque or stenosis.
Velocity, direction, and turbulence provide complementary information rather than a single measurement. Velocity describes the speed of flow, direction indicates its orientation, and turbulence identifies disturbed flow patterns. Considering these findings alongside vessel structure helps clinicians assess whether blood movement is altered near plaque or narrowing, supporting a more complete evaluation of carotid vascular disease.
Two-dimensional imaging adds structural context to the flow data. It can show the vessel’s form and help place velocity, direction, and turbulence findings in relation to plaque or stenosis. This combination matters because an abnormal flow measurement can be interpreted alongside visible vessel changes, allowing the examination to assess both arterial structure and the movement of blood through it.
Because the examination is noninvasive and does not use ionizing radiation, it can be incorporated into vascular assessment without the exposure associated with radiation-based imaging. That characteristic is especially relevant when clinicians need to evaluate carotid vessels repeatedly, such as during diagnostic assessment or follow-up, while tracking vascular findings or response to treatment.
Its clinical roles include screening for vascular disease, investigating findings that may indicate carotid plaque or stenosis, and monitoring known disease over time. The examination can therefore support different stages of care: identifying potentially important arterial changes, evaluating their relationship to cerebral blood flow, and checking whether findings change after treatment.
Plaque and stenosis are clinically important because narrowing may reduce cerebral blood flow, while their presence can also signal increased stroke risk. Carotid Doppler does not merely record whether blood is moving; by combining flow measurements with vessel imaging, it supplies information that helps characterize these vascular changes within a neurological risk assessment.