Doppler los angeles california




















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Watch Now. Local News. Weather Traffic U. Station Info. Newsmakers Our America Localish. Follow Us:. Share Tweet Email. He or she may also squeeze your calf or forearm to help blood move more quickly through the veins. This is called an augmentation maneuver. It is done to check blood flow toward your heart. While your legs are being tested, you may also be asked to try to breathe out strongly with your nose pinched and your mouth closed.

This is called a Valsalva maneuver. It usually causes a sudden change in blood flow through the veins. You will be asked to lie down with a pillow under your head for support.

The test is done on both sides of your neck. Then the results are compared to standard values to find out how much the arteries are blocked or narrowed. For this type of ultrasound, the transducer is passed lightly over the skin at the base or side of your skull. The transducer is moved back and forth on your belly until the doctor finds the blood vessel that needs to be studied.

After the doctor has found the blood vessel, it may take some time to assess the blood flow. The test will take 30 to 60 minutes. This test usually doesn't cause any pain or discomfort. There are no known risks from having this test. The scans from the test will be read within a short time. There is no sign of a clot in any of the veins examined.

The size and position of veins are normal. Normal blood flow is found in the blood vessels that supply oxygen and nutrients to a fetus. 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 spot 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 found. The speed of blood flow may be compared to standard values to find out how blocked or narrow the blood vessel is. A duplex Doppler ultrasound graph may show blood flow that isn't normal. This is a sign of a blocked or narrowed blood vessel.

In the veins, a blood clot may be present if blood flow does not change in response to breathing or does not increase after 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 maneuver. Abnormal veins, such as varicose veins , are seen. There is an abnormal increase or decrease in blood flow through the vessels that supply oxygen and nutrients to a fetus. Author: Healthwise Staff. This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information.

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Test Overview A Doppler ultrasound test uses reflected sound waves to see how blood flows through a blood vessel. The three basic types of Doppler ultrasound are: "Bedside" or continuous wave Doppler.



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