There are no known risks linked with a
Doppler ultrasound test. This test will not harm a developing baby (fetus).
ultrasound test uses reflected sound waves to see how
blood flows through a blood vessel.
There are no findings of
significant narrowing or other abnormality in any of the arteries
There is no evidence of a clot
in any of the veins examined. The size and position of veins are
Normal blood flow is found in
the blood vessels that supply oxygen and nutrients to a
For continuous wave Doppler or
duplex Doppler, differences in blood flow between the right and left sides of
the body may be heard. At the exact location where an artery is blocked or
narrowed, the sound may be high-pitched or turbulent. Blockage (such as from a
blood clot), an
aneurysm, or narrowing of a blood vessel may be
detected. The speed of blood flow may be compared to standard values to find
out the amount of blockage or narrowing of the blood vessel.
A duplex Doppler ultrasound
graph may show irregular flow that means a blocked or narrowed blood
A color Doppler image may show
a blocked or narrowed blood vessel or an aneurysm.
In the veins, a blood clot may
be indicated if blood flow does not change in response to breathing or does not
increase in response to either a compression maneuver or
Valsalva maneuver. Incomplete blockage of a vein by a
blood clot may be seen on color Doppler or during a compression