![]() The physician conducting the test sees the resulting waves as real-time images displayed on the screen of the console.ĭoppler technology is particularly useful for evaluating veins because it measures both the speed and the direction of blood cells while they travel through vessels. The type of body structure and the makeup of the body tissue through which the signal travels are important factors.Īs sound waves bounce off blood vessels, the transducer records extremely small alterations in the pitch and direction. ![]() It is a composite of the loudness, pitch, and time required for an ultrasound signal to travel from the body to the transducer. The technology then awaits echoes from the body’s tissue much like sonar works in submarines.Ī physician is able to immediately see an ultrasound image on the video screen. The transducer sends out high-frequency sound waves into the targeted area. A staff member applies a clear gel to the patient’s skin. A transducer is a hand-held device that looks like a microphone and that attaches to a scanner with a cord.Ī typical test takes up to half an hour. A console holds a computer, other electronic components, and a video screen. Vein testing during a Doppler ultrasound procedure involves using two pieces of equipment while a patient lies on a movable exam table. Evaluating congenital malformations of veins and arteriesĭoppler technology also allows physicians to identify tumors, narrowing of blood vessels, and abnormal blood flow to organs.Looking at a blood vessel graft used during dialysis.Mapping veins in a limb prior to treatment.Placing a catheter or a needle in a vein.Determining a reason such as varicose veins for long-term swelling in a leg.Searching for blood clots, particularly in the legs.RadiologyInfo cites these most common uses: Doppler ultrasound allows a physician to evaluate blood flow through vessels in the abdomen, legs, neck, arms, brain, liver, kidneys, or other organs. ![]() It can produce images of tissue in various body locations. This test utilizes sound waves to create pictures of targeted veins. According to MedlinePlus, it is an initial diagnostic step and carries no risk. Overview of This Vein TestingĪ Doppler procedure uses ultrasound to examine blood vessels and help create a treatment plan. Doctors perform it on an outpatient basis at either a vascular clinic or a radiology facility. One of the most useful types of technology for looking at a patient’s veins is the venous Doppler procedure.
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