VanBay Area Medical Information (
Mobile Radiology
in Pinellas County, Florida

Ultrasound (mobile)
MedX Diagnostic Services 4707 140th Ave. N., Suite 107, Clearwater, FL 33762  Phone: (727) 524-7760, Fax: (727) 524-7761
(Ultrasound, vascular studies, cardiac studies and monitoring)
Mobile Ultrasound Services, 1-800-441-5666
(Cardiac Echocardiograms, Holter monitors, Vascular & General Ultrasound)

X-ray and EKG services (mobile)
Home Care X-ray Services 727-531-5885 (mobile xray and EKG services)
Rads Mobile X-ray and Digital Imaging, Phone (727)-443-0389 or (727)  376-0925 (mobile xray and EKG services)

What is Deep Vein Thrombosis?
A deep vein thrombosis is a blood clot that forms in a deep vein, usually in the legs or hips.  They also can occur in other parts of the body. Blood clots in the veins of the thigh are usually more serious than blood clots that happen in veins in your lower leg. If a clot in a vein breaks off and travels through your bloodstream, it can lodge in your lung. This is called a pulmonary embolism which can be a life-threatening condition. 

Blood clots also can occur in veins that are close to the surface of the skin. These types of blood clots are called superficial venous thrombosis or phlebitis. Blood clots in superficial veins cannot travel to the lungs.

Ultrasound is the main test used to help diagnose deep vein thrombosis. It is completely pain free. A handheld device is passed back and forth on the surface of the affected area, sending sound waves from the body to a machine that generates and displays a picture of the blood flow on a video screen for a doctor to evaluate.  At times additional testing is needed:
  • Repeat ultrasounds, usually done a few days to a week apart.
  • Venography. In venography, a contrast dye is injected into the veins to make them visible on an X-ray picture.

Additional tests may be used when ultrasound results are unclear and venography is not available or results do not provide a clear diagnosis. These tests may help diagnose or exclude a blood clot in the leg but are not frequently needed. Additional tests may include:

  • D-dimer test. This blood test is sometimes used either before ultrasound or after ultrasound if the results or not clear to rule out the possibility of deep vein thrombosis in low-risk cases.
  • Magnetic resonance imaging (MRI).
  • Computed tomography (CT) scan.

(1) Deep Vein Thrombosis from the National Heart, Lung and Blood Institute, National Institute of Health

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