Health Tests

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Venous Ultrasound of the Legs (lower extremity doppler)

What is the test?

This type of ultrasound shows if there is a blockage in a leg vein. Such blockages are usually caused by blood clots, which can be dangerous and even life threatening if they break loose and travel through the blood to the lungs. If you have pain or swelling in one leg, your doctor may order an ultrasound to determine whether your symptoms are caused by a blockage.

From Health A-Z, Harvard Health Publications. Copyright 2007 by the President and Fellows of Harvard College. All rights reserved. Written permission is required to reproduce, in any manner, in whole or in part, the material contained herein. To make a reprint request, contact Harvard Health Publications. Used with permission of StayWell.

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