Other Names: Venous duplex, arterial duplex, venous ultrasound, arterial ultrasound, peripheral vascular screening

Description/Test Basics/Reasons for the test:  Duplex ultrasound painless, non-invasive diagnostic test to see how blood moves through your arteries and veins.  is a form of ultrasound that produces images that can differentiate between the body's soft tissues and its fluid-filled structures. It can also be used to detect the movement of blood cells, or blood flow, and image the structure of the blood vessels- arteries and veins- through which the blood is flowing. It can also tell the width of a blood vessel and reveal any blockages.

There are different types of duplex ultrasound exams. Some include:

  • Arterial and venous duplex ultrasound of the abdomen examines blood vessels and blood flow in the abdominal area.
  • Carotid duplex ultrasound looks at the carotid artery in the neck.
  • Duplex ultrasound of the extremities looks at the arms or legs.  The purpose of a venous sonogram is to evaluate the venous blood flow to the legs to determine if there is any narrowing (stenosis) or clotting (deep vein thrombosis)
  • Renal duplex ultrasound examines the kidneys and their blood vessels. A Renal artery sonogram allows the physician to determine if there is a stenosis or narrowing of the renal arteries. It can also assess the size and shape of the kidney.

Test preparation/pre-test guidelines: Please wear a two-piece outfit. Please do not wear jumpsuit, overalls, or a dress. Please do not eat or drink anything 8 hours prior to the test. If you routinely take any medications, take them as prescribed with a small amount of water. 
There is usually no restriction of food or liquid before the duplex ultrasound is performed. The physician will provide any special instructions regarding medications, as appropriate. Usually, there is no preparation for a duplex ultrasound. If you are having an ultrasound of your stomach area, you may be asked not to eat or drink after midnight. Tell the person doing the ultrasound exam if you are taking any medicines, such as blood thinners, that might affect the results of the test. 

Test process/How the test is done: You will be asked to lay on your back. Your head will be slightly elevated and supported to prevent it from moving.  Beth Lovett, our trained sonographer, will request that you lay quietly during the test to help ensure the images are clear.  She will then apply a water-soluble gel on your skin and gently run a transducer, or ultrasound probe, over your skin to obtain images of the underlying blood vessels and structures DO we do color flow mapping.

Post-test guidelines: Patients can resume normal activity immediately following the exam.

Test location:  Your venous/arterial doppler examination will be performed at our main office, located in Denton, Texas:   

The Heart Center of North Texas
3304 Colorado Blvd.
Suite 101
Denton, TX 76210

HOSPITAL PRIVILEGES:   •  Denton Regional Medical Center   •  Texas Health Presbyterian Hospital Denton
   •  Muenster Memorial Hospital   •  North Texas Medical Center

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